klp-3 Antibody

What is klp-3 and why is it important in research?

klp-3 is a kinesin motor gene/protein that belongs to the kinesin heavy chain (KHC) family, with significant homology to the Neurospora crassa KHC. In Schizosaccharomyces pombe (fission yeast), the klp3+ gene has been identified and studied for its role in cellular processes . The protein is particularly important in research because it affects Golgi membrane recycling processes. When treated with brefeldin A (BFA), klp3 null cells show defective Golgi-to-ER recycling, suggesting that Klp3 plays a specific role in BFA-induced membrane transport .

Kinesin proteins like klp-3 are motor proteins that move along microtubules and are critical for various cellular functions including organelle transport, chromosome segregation during cell division, and maintaining cell structure. The study of klp-3 contributes to our understanding of fundamental cellular transport mechanisms, making its antibodies valuable tools for researchers investigating these cellular processes.

How are klp-3 antibodies typically produced for research applications?

klp-3 antibodies for research are typically produced using recombinant protein expression systems. While the search results don't provide the specific production method for klp-3 antibodies, we can infer the likely approach based on the documented production of related kinesin antibodies such as KLP-18.

A standard methodology involves:

• Amplifying a fragment of the target gene using PCR with primers containing appropriate restriction sites

• Cloning this fragment into an expression vector (commonly using a 6× His-tag expression system)

• Transforming the construct into a bacterial expression system (typically E. coli)

• Inducing protein expression

• Purifying the recombinant protein using affinity chromatography (Ni²⁺-NTA matrix for His-tagged proteins)

• Immunizing animals (typically rabbits or rats) with the purified protein

• Collecting and purifying antibodies from animal serum using affinity chromatography with the antigen

For example, in the production of KLP-18 antibodies, researchers amplified a 1.2-kb fragment encoding the C-terminal 425 amino acids, cloned it into a pQE-30 expression vector, transformed it into E. coli strain M15[pREP4], and purified the recombinant protein for immunization . Similar methods are likely employed for klp-3 antibody production.

What are the validated applications for klp-3 antibodies in research?

Based on the available information, klp-3 antibodies have been validated for the following applications:

Commercial sources indicate that klp-3 antibodies react specifically with C. elegans samples and are primarily validated for Western blot and ELISA applications . While not explicitly stated for klp-3, related kinesin antibodies are often used for immunolocalization studies to determine the subcellular distribution of the protein, which suggests similar potential applications for klp-3 antibodies.

How should I design controls for klp-3 antibody validation experiments?

When validating klp-3 antibodies for research applications, implementing appropriate controls is essential to ensure specificity and reliability of results:

Positive Controls:

• Wild-type C. elegans lysate known to express klp-3 protein

• Recombinant klp-3 protein expressed in a heterologous system

• Tissues/cells with documented klp-3 expression

Negative Controls:

• Lysates from klp-3 null mutants or knockdown organisms (if available)

• Pre-immune serum from the same animal used to generate the antibody

• Antibody pre-absorption test: Incubating the antibody with excess purified antigen before application (as done with KLP-18 antibodies, where antibodies were incubated with 6× His-KLP-18 protein at 0.5–1 μg/μl)

• Secondary antibody-only controls to assess background staining

Loading Controls:

• For Western blots, probing for a housekeeping protein such as α-tubulin (as seen in KLP-18 studies where anti-α-tubulin at 1:500 dilution was used)

Cross-reactivity Assessment:

• Testing against closely related kinesin family proteins to ensure specificity

• Testing in organisms where klp-3 is absent or highly divergent

A methodical approach to validation using these controls will help ensure that experimental results using klp-3 antibodies are reliable and specific.

What are the optimal protocols for using klp-3 antibodies in Western blot analysis?

Based on protocols used for similar kinesin proteins, the following Western blot protocol would be optimal for klp-3 antibody applications:

Sample Preparation:

• Collect 20-100 young adult C. elegans hermaphrodites in 10 μl of buffer (e.g., M9)

• Flash freeze in liquid nitrogen

• Add equal volume of 2× SDS sample buffer

• Boil samples for 10 minutes, then chill on ice for 5 minutes before loading

Gel Electrophoresis:

• Load samples on a 10% SDS-polyacrylamide gel

• Include molecular weight markers

Transfer and Immunoblotting:

• Transfer proteins to nitrocellulose membrane

• Block with TBT (Tris-buffered saline with 0.1% Tween 20) containing 1% bovine serum albumin, 3% nonfat dry milk powder, and 0.02% sodium azide for 1 hour at room temperature

• Incubate with primary anti-klp-3 antibody (recommended dilution 1:500) overnight at 4°C

• Wash three times for 5 minutes each with TBT

• Incubate with HRP-conjugated secondary antibody (1:10,000) for 1.5 hours at room temperature

• Wash three times for 5 minutes each with TBT

• Detect using chemiluminescence substrate

Additional Recommendations:

• Include α-tubulin as a loading control (1:500 dilution)

• Expected molecular weight of klp-3 should be determined based on its amino acid sequence

• For reporbing, wash the membrane with TBT blocking buffer (remember that sodium azide irreversibly inactivates HRP)

This protocol is adapted from the Western blot methods used for KLP-18 detection and should work effectively for klp-3 antibodies with minor optimizations based on specific antibody characteristics.

What methodologies are recommended for klp-3 protein localization studies?

For effective localization of klp-3 protein in cellular contexts, the following immunofluorescence methodology is recommended:

Sample Preparation:

• Fix specimens using an appropriate fixative (typically 4% paraformaldehyde for 15-30 minutes)

• Permeabilize with 0.1-0.5% Triton X-100 to allow antibody access

• For C. elegans, freeze-crack methods may improve antibody penetration

Immunostaining Protocol:

• Block non-specific binding with blocking buffer (e.g., 1% BSA, 3% normal serum in PBS)

• Incubate with primary anti-klp-3 antibody (starting dilution 1:200-1:3000, to be optimized)

• Wash thoroughly with PBS containing 0.1% Tween 20

• Incubate with fluorophore-conjugated secondary antibody (e.g., Cy2, Cy3, or Alexa 647; 1:200 dilution)

• Include nuclear staining (e.g., with Yoyo-1 at 1:20,000 dilution)

• Mount specimens for microscopy using appropriate anti-fade mounting medium

Co-localization Studies:

• Consider co-staining with antibodies against microtubules (anti-α-tubulin, 1:40 dilution)

• For membrane trafficking studies, include markers for Golgi apparatus and endoplasmic reticulum

Controls:

• Include antibody specificity control by pre-incubating anti-klp-3 with excess recombinant klp-3 protein

• Include secondary antibody-only controls

• When possible, include klp-3 null or knockdown samples as negative controls

Visualization:

• Use confocal microscopy for optimal resolution of subcellular structures

• Consider super-resolution techniques for detailed localization studies

Based on studies of related kinesins, klp-3 might be expected to show cytoplasmic localization, possibly appearing as distinct patches coincident with microtubules, similar to the pattern observed with Klp3 in S. pombe .

How can RNAi approaches be utilized to study klp-3 function in conjunction with antibody studies?

RNAi (RNA interference) provides a powerful approach to assess klp-3 function when combined with antibody-based detection methods. Based on techniques used for related kinesin studies, the following methodologies are recommended:

dsRNA Preparation:

• Identify a specific region of the klp-3 gene that lacks homology with other kinesin family members

• Amplify this region using PCR (typically 200-1200 bp fragments are effective)

• Generate dsRNA through in vitro transcription using T7 RNA polymerase

• Anneal complementary RNA strands by heating to 70°C and cooling to room temperature

RNAi Delivery Methods:

• Microinjection: Inject dsRNA (0.5 μg/μl) directly into the gonads of young adult hermaphrodites

• Feeding: Clone the klp-3 fragment into an appropriate feeding vector (e.g., L4440), transform into RNase III-deficient bacteria (HT115), and feed to animals

• Soaking: Immerse animals in dsRNA solution (less commonly used)

Phenotypic Analysis:

• Examine progeny 24-48 hours post-treatment

• Prepare samples for antibody staining to confirm knockdown

• Assess cellular phenotypes through microscopy

Validation of Knockdown:

• Use Western blot with anti-klp-3 antibody to confirm protein reduction

• Quantify band intensity compared to control samples

• Include α-tubulin as a loading control

Combined Approaches:

• Perform rescue experiments by expressing RNAi-resistant klp-3 constructs

• Create chimeric or domain-deletion constructs to identify functional domains

• Use temperature-sensitive mutant backgrounds to enhance phenotypes

This approach parallels the methodology used for KLP-18 studies in C. elegans, where a 194-bp PCR product derived from the middle of the gene was used to generate specific dsRNA for RNAi experiments .

How should researchers interpret discrepancies between klp-3 antibody signal and genetic expression data?

When confronted with discrepancies between klp-3 antibody detection and genetic expression data, consider the following analytical framework:

Potential Causes of Discrepancies:

• Post-transcriptional regulation:

  • Measure mRNA stability using pulse-chase experiments with transcription inhibitors

  • Assess involvement of microRNAs using bioinformatic prediction tools and validation experiments

• Post-translational modifications:

  • Investigate phosphorylation, ubiquitination, or other modifications that might affect antibody recognition

  • Use phosphatase treatments or specific inhibitors to assess modification impact

• Protein stability and turnover:

  • Conduct pulse-chase experiments with protein synthesis inhibitors

  • Assess proteasome involvement using inhibitors like MG132

• Antibody technical limitations:

  • Epitope masking due to protein conformation or interactions

  • Cross-reactivity with related kinesin family members

  • Fixation artifacts affecting epitope accessibility

Resolution Strategies:

• Multiple antibody approach:

  • Use antibodies targeting different klp-3 epitopes

  • Compare monoclonal and polyclonal antibody results

• Alternative detection methods:

  • Generate epitope-tagged klp-3 constructs for detection with tag-specific antibodies

  • Use mass spectrometry for protein identification and quantification

• Spatial considerations:

  • Subcellular compartmentalization may lead to concentrated protein in specific locations

  • Protein may be sequestered in insoluble fractions missed by certain extraction methods

• Temporal dynamics:

  • Protein might have different half-life than mRNA

  • Consider developmental timing or cell-cycle dependent expression

When analyzing such discrepancies, systematically rule out technical factors before concluding biological significance. Reproducibility across different experimental approaches strengthens confidence in observations that contradict expected patterns.

What approaches can be used to study klp-3 interactions with other proteins in membrane trafficking pathways?

To investigate klp-3 interactions within membrane trafficking pathways, researchers should consider these methodological approaches:

Co-immunoprecipitation (Co-IP):

• Prepare lysates under non-denaturing conditions to preserve protein-protein interactions

• Immunoprecipitate with anti-klp-3 antibody bound to protein A/G beads

• Analyze co-precipitated proteins by Western blot or mass spectrometry

• Include appropriate controls (IgG control, reciprocal IPs)

Proximity Labeling Techniques:

• Generate BioID or TurboID fusion constructs with klp-3

• Express in relevant cell types to biotinylate proximal proteins

• Purify biotinylated proteins using streptavidin beads

• Identify interaction partners through mass spectrometry

Functional Assays:

• Brefeldin A (BFA) challenge: Based on the known role of klp-3 in BFA-induced Golgi-to-ER recycling , monitor trafficking defects in the presence/absence of candidate interacting proteins

• FM4-64 dye uptake: Use this vital dye to visualize endocytosis and transport to vacuoles in wild-type versus mutant backgrounds

• Cargo tracking: Monitor the movement of fluorescently tagged cargo proteins that depend on membrane trafficking pathways

Genetic Interaction Studies:

• Generate double mutants between klp-3 and candidate genes

• Assess synthetic phenotypes that might indicate functional relationships

• Perform suppressor/enhancer screens to identify new interaction partners

Structural Biology Approaches:

• Use yeast two-hybrid or mammalian two-hybrid systems to map interaction domains

• Express and purify protein domains for in vitro binding assays

• Consider cryo-EM studies for larger complexes

Live Imaging:

• Generate fluorescently tagged klp-3 and candidate interacting proteins

• Perform dual-color live imaging to assess co-localization and co-transport

• Use FRET or BRET techniques to assess direct interactions in living cells

Since klp-3 appears to be involved in Golgi membrane recycling in response to BFA , focus initial studies on proteins known to participate in Golgi-to-ER transport, such as COPI components, Arf1 GTPase, and tethering factors.

What are common technical challenges when using klp-3 antibodies and how can they be addressed?

Researchers working with klp-3 antibodies may encounter several technical challenges. Here are common issues and recommended solutions:

High Background Signal:

• Cause: Insufficient blocking, antibody concentration too high, or non-specific binding

• Solution: Optimize blocking conditions (try different blocking agents like 5% milk, 3% BSA, or commercial blockers); titrate antibody concentration; include 0.1-0.3% Tween-20 in wash buffers; extend washing steps

Weak or No Signal:

• Cause: Low protein abundance, epitope masking, or protein degradation

• Solution: Increase protein loading; try different extraction buffers; add protease inhibitors; optimize antibody concentration; consider antigen retrieval methods; extend primary antibody incubation time (overnight at 4°C)

Multiple Bands on Western Blot:

• Cause: Degradation products, cross-reactivity, or post-translational modifications

• Solution: Use fresh samples with protease inhibitors; pre-absorb antibody with related antigens; perform peptide competition assays; use gradient gels for better resolution

Inconsistent Results:

• Cause: Antibody batch variation, sample preparation inconsistencies

• Solution: Use the same antibody lot when possible; standardize sample collection and processing; include positive controls in each experiment

Poor Reproducibility in Immunostaining:

• Cause: Fixation artifacts, variable antibody penetration

• Solution: Test different fixation methods (paraformaldehyde, methanol, or mixed fixatives); optimize permeabilization; use freeze-crack methods for C. elegans specimens

Optimization Guidelines:

Working with challenging antibodies requires systematic optimization of multiple parameters while changing only one variable at a time to identify optimal conditions.

How can researchers distinguish between specific and non-specific binding of klp-3 antibodies?

Distinguishing between specific and non-specific binding is critical for reliable results with klp-3 antibodies. The following validation approaches are recommended:

Genetic Validation:

• Null mutant/knockdown controls: The most definitive approach is to test the antibody in samples where klp-3 has been genetically deleted or knocked down. Specific signals should be absent or significantly reduced.

• Overexpression controls: Complementary to knockdown, overexpression should result in increased signal intensity if binding is specific.

Biochemical Validation:

• Peptide competition assay: Pre-incubate the antibody with excess purified klp-3 antigen (0.5–1 μg/μl) before application . Specific signals should be blocked while non-specific signals remain.

• Immunodepletion: Serially deplete the antibody with the target antigen and test residual detection capability.

• Immunoprecipitation-Western blot: If the antibody immunoprecipitates a protein of the expected molecular weight that is also detected by Western blot, specificity is supported.

Technical Controls:

• Isotype control: Use matched isotype control antibodies at the same concentration to assess background binding.

• Secondary antibody-only: Omit primary antibody to detect non-specific secondary antibody binding.

• Cross-adsorption: Pre-adsorb antibodies against tissues/lysates from species with low homology to target protein.

Pattern Analysis:

• Consistency with mRNA expression: Compare protein localization pattern with known mRNA expression patterns.

• Subcellular localization: Verify that detected localization is consistent with known biology of kinesin motors (e.g., association with microtubules).

• Multiple antibodies: Use antibodies targeting different epitopes of klp-3; consistent patterns suggest specificity.

Sample Processing Analysis:

• Fixation artifacts: Compare different fixation methods to distinguish genuine signal from fixation-induced patterns.

• Extraction dependency: Test different extraction methods to ensure signal is not an artifact of specific buffers.

By systematically applying these approaches, researchers can confidently distinguish between specific klp-3 detection and technical artifacts.

How can klp-3 antibodies be optimized for use in diverse model organisms?

Optimizing klp-3 antibodies for use across different model organisms requires careful consideration of evolutionary conservation and methodological adaptations:

Cross-Species Epitope Analysis:

• Perform sequence alignment of klp-3 across target species

• Identify highly conserved regions as potential universal epitopes

• Generate phylogenetic trees to understand evolutionary relationships between klp-3 homologs

• Select or design antibodies targeting conserved epitopes

Species-Specific Optimization Strategies:

Validation Approaches:

• Generate species-specific recombinant proteins for antibody testing

• Perform Western blot validation in each target organism

• Use genetic tools (CRISPR/Cas9, RNAi) in each organism to generate negative controls

• Compare detection patterns with endogenous fluorescent fusion proteins when available

Technical Adaptations:

• Sample preparation: Develop species-appropriate homogenization and extraction protocols

• Fixation optimization: Systematically test fixatives (formaldehyde, methanol, glutaraldehyde) and fixation times

• Antigen retrieval: Test heat-induced, enzymatic, or pH-based retrieval methods

• Block optimization: Test species-matched normal sera to reduce background

• Signal amplification: Consider tyramide signal amplification for low abundance targets

When working across multiple model systems, maintain detailed documentation of optimization parameters for each organism to ensure reproducibility and facilitate cross-species comparisons.

How might emerging antibody technologies enhance the study of klp-3 function in cellular transport?

Emerging antibody technologies offer significant potential to advance klp-3 research in several key areas:

Nanobodies and Single-Domain Antibodies:

• Single-domain antibodies derived from camelid species offer smaller size (~15 kDa vs ~150 kDa for conventional antibodies)

• Their reduced size allows better tissue penetration and access to hindered epitopes

• Can be expressed intracellularly as "intrabodies" to track and potentially modulate klp-3 function in living cells

• May access epitopes in narrow spaces between microtubules and motor proteins

Antibody Fragment Technologies:

• Fab, scFv, and other antibody fragments provide advantages for super-resolution microscopy

• Reduced distance between fluorophore and target improves localization precision

• Particularly valuable for studying klp-3's interaction with microtubules at nanoscale resolution

Bispecific Antibodies:

• Antibodies targeting both klp-3 and potential cargo/adaptor proteins

• Enable visualization of transient interactions during transport processes

• May be used to artificially induce or block specific interactions

Proximity-Dependent Labeling:

• Antibody-enzyme fusion proteins (HRP, APEX2, TurboID) conjugated to anti-klp-3

• Allow identification of proteins in close proximity to klp-3 at specific cellular locations

• Can resolve dynamic interaction networks during different trafficking events

Optogenetic and Chemogenetic Applications:

• Light or small molecule-responsive antibody technologies

• Enable temporal control of klp-3 binding or function

• Allow precise perturbation of klp-3 activity during specific transport events

Site-Specific Modifications:

• Antibodies recognizing specific post-translational modifications of klp-3

• Help clarify how phosphorylation or other modifications regulate motor activity

• Detect conformational changes associated with ATP binding/hydrolysis cycles

Implementation Strategies:

• Develop and validate nanobodies against key functional domains of klp-3

• Create intracellular expression systems for real-time tracking in living cells

• Integrate with optogenetic approaches for spatiotemporal control

• Combine with super-resolution microscopy for nanoscale localization

These emerging technologies will particularly enhance understanding of klp-3's role in Golgi membrane recycling, potentially revealing mechanistic details of how this kinesin facilitates membrane transport during BFA-induced Golgi-to-ER trafficking .

What are promising approaches for studying the relationship between klp-3 and other kinesin family members?

Understanding the functional relationships between klp-3 and other kinesin family members requires sophisticated comparative approaches:

Comprehensive Phylogenetic Analysis:

• Construct detailed phylogenetic trees of kinesin superfamily proteins across diverse species

• Identify evolutionary conservation patterns in motor domains versus cargo-binding regions

• Use computational approaches to predict functional redundancy or specialization

• Map known disease mutations across family members to identify critical functional regions

Comparative Binding Studies:

• Develop antibody panels against multiple kinesin family members

• Perform systematic co-immunoprecipitation studies to identify shared versus unique binding partners

• Use protein arrays to compare cargo preferences across family members

• Develop antibodies against shared epitopes to detect entire subfamilies

Functional Redundancy Assessment:

• Generate single and multiple kinesin knockouts/knockdowns

• Use rescue experiments with chimeric motors to identify functional domains

• Perform high-content screening to identify compensatory mechanisms when klp-3 is absent

• Develop antibodies that can simultaneously detect multiple family members to assess upregulation

Structure-Function Relationships:

• Use antibodies as tools to probe conformational states across kinesin family

• Develop conformation-specific antibodies that recognize active versus inactive states

• Compare microtubule binding domains and nucleotide sensitivity across family members

• Use antibody inhibition studies to dissect unique versus redundant functions

Combined Genetic-Biochemical Approaches:

• Create CRISPR-engineered cell lines with tagged endogenous kinesins

• Develop multiplexed imaging approaches to simultaneously track multiple kinesin family members

• Perform quantitative proteomics to measure stoichiometry of different kinesins on the same cargo

• Use antibodies in super-resolution approaches to measure colocalization at nanoscale resolution

Cargo Specificity Determination:

• Develop cargo-specific isolation methods combined with kinesin-specific antibodies

• Create peptide arrays of cargo-binding domains to compare binding preferences

• Use proximity labeling with family-specific antibodies to identify unique cargo interactions

• Develop quantitative assays to measure relative affinities for shared cargos

Given that klp-3 has been implicated in Golgi membrane recycling , these approaches could reveal whether this function is uniquely performed by klp-3 or shared with other kinesin family members, potentially uncovering functional redundancies or cooperative mechanisms in membrane trafficking pathways.

What are the most critical considerations for successful application of klp-3 antibodies in research?

Successful application of klp-3 antibodies in research depends on several critical considerations that should be addressed systematically:

Antibody Validation:

• Thorough validation is the cornerstone of reliable results

• Genetic approaches (using klp-3 null mutants or knockdowns) provide the most definitive validation

• Multiple validation methods should be used, including Western blot, immunofluorescence, and peptide competition assays

• Cross-reactivity with related kinesin family members should be rigorously tested

Experimental Design:

• Include appropriate positive and negative controls in every experiment

• Optimize protocols specifically for each application and model system

• Document all experimental parameters meticulously for reproducibility

• Consider the biological context (developmental stage, cell cycle phase) when interpreting results

Technical Expertise:

• Develop proficiency in sample preparation techniques appropriate for the tissue/organism

• Master fixation and permeabilization methods that preserve epitope accessibility

• Optimize image acquisition settings for consistent and quantifiable results

• Apply quantitative analysis methods rather than relying solely on visual assessment

Biological Interpretation:

• Place klp-3 findings in the broader context of kinesin biology and membrane trafficking

• Consider functional redundancy with other kinesins when interpreting knockdown/knockout phenotypes

• Recognize that antibody detection reflects protein levels, which may not directly correlate with activity

• Integrate findings with other approaches (live imaging, biochemical assays) for comprehensive understanding

Methodological Innovation:

• Continually refine approaches as new antibody technologies emerge

• Consider developing antibodies against specific post-translational modifications or conformational states

• Explore new applications such as proximity labeling or super-resolution microscopy

• Combine antibody approaches with emerging genetic tools for maximal insight

By addressing these considerations systematically, researchers can maximize the value of klp-3 antibodies as tools for investigating fundamental cellular transport mechanisms, particularly in membrane trafficking pathways where klp-3 has been implicated in Golgi-to-ER recycling .

How might future research on klp-3 contribute to broader understanding of cellular transport mechanisms?

Future research on klp-3 using antibody-based and complementary approaches has significant potential to advance our understanding of cellular transport mechanisms in several key areas:

Membrane Trafficking Pathways:

• klp-3's documented role in BFA-induced Golgi-to-ER recycling provides an entry point for dissecting kinesin contributions to membrane trafficking

• Further research could reveal how motor proteins coordinate with coat proteins and tethering factors during vesicle formation and fusion

• Understanding klp-3 regulation could illuminate how trafficking pathways adapt to cellular stress

Motor-Cargo Specificity:

• Detailed mapping of klp-3 binding partners could reveal principles governing motor-cargo recognition

• Comparative studies with other kinesins might uncover cargo-binding code mechanisms

• Research could identify how cargo selection changes during development or cellular differentiation

Evolutionary Perspectives:

• Studies across diverse organisms may reveal how kinesin functions specialized during evolution

• Comparison of klp-3 in single-celled organisms versus multicellular systems could illuminate adaptation of transport machineries

• Conservation analysis may identify universally critical domains versus species-specific adaptations

Disease Relevance:

• Understanding fundamental klp-3 mechanisms may provide insights into human diseases involving kinesin family members

• Research could reveal how transport defects contribute to neurological disorders

• Findings might suggest therapeutic approaches targeting specific kinesin functions

Emergent Properties:

• Studies of klp-3 alongside other motors could reveal how diverse motors coordinate on shared cargos

• Research may uncover principles of transport regulation during complex cellular processes

• Understanding of motor cooperation could illuminate self-organization principles in cellular architecture

Methodological Advancements:

• Development of new antibody-based tools for klp-3 research could drive broader technological innovation

• Approaches developed for studying klp-3 might be applied across the cytoskeleton field

• Integration of structural, genetic, and cell biological approaches might create paradigms for studying other motor proteins