NBPF1/NBPF9/NBPF10/NBPF12/NBPF14/NBPF15/NBPF16/NBPF20 Antibody

What is the NBPF gene family and what are their primary functions?

The NBPF (Neuroblastoma Breakpoint Family) gene family consists of multiple members including NBPF1, NBPF9, NBPF10, NBPF12, NBPF14, NBPF15, NBPF16, and NBPF20. These genes encode proteins involved in diverse biological functions such as cell growth, proliferation, and differentiation. Understanding these genes provides valuable insights into various disease processes, including cancer and neurological disorders. The NBPF10 protein specifically has a reported length of 3795 amino acid residues and a mass of 435.6 kDa, with subcellular localization in the cytoplasm .

What are the key specifications of the NBPF1/NBPF9/NBPF10/NBPF12/NBPF14/NBPF15/NBPF16/NBPF20 antibody?

The NBPF family antibody is a polyclonal antibody generated in rabbits that exhibits high reactivity with human samples. It is available in liquid form and is supplied in PBS containing glycerol, BSA, and sodium azide. The antibody is typically affinity-purified from rabbit antiserum using epitope-specific immunogen chromatography. Different catalog versions may have different concentrations, with some products supplied at 1 mg/ml .

What applications is the NBPF family antibody validated for?

The NBPF family antibody has been validated for multiple applications including:

These applications allow researchers to detect and analyze the expression of NBPF proteins in different cell types and tissues, providing insights into their biological functions and potential roles in disease processes .

How should I optimize Western blot protocols for detecting NBPF family proteins?

When optimizing Western blot protocols for NBPF proteins, consider that these are high molecular weight proteins (e.g., NBPF10 is 435.6 kDa). Use lower percentage gels (6-8%) for better resolution of large proteins. For primary antibody incubation, start with a 1:1000 dilution in 5% BSA/TBST and incubate overnight at 4°C. Given the reactivity profile, this antibody is specifically designed for human samples, so ensure your experimental design accounts for this specificity .

For optimal results, include positive controls from cell lines known to express NBPF proteins, and negative controls using siRNA knockdown of target proteins. Transfer time may need to be extended for these large proteins, and blocking should be performed with 5% non-fat milk or BSA in TBST for at least 1 hour at room temperature to minimize background .

What are the critical considerations for immunohistochemistry using the NBPF family antibody?

For immunohistochemistry applications, begin with a 1:200 dilution as a starting point within the recommended range (1:100-1:300). Antigen retrieval is critical – use citrate buffer (pH 6.0) for heat-induced epitope retrieval. Since the antibody's immunogen is derived from the C-terminal region of human NBPF proteins, ensure your sample preparation methods preserve epitope integrity .

Counterstain with hematoxylin for better visualization, and include appropriate positive controls (human tissues known to express NBPF proteins) and negative controls (omission of primary antibody). For quantitative analysis, use digital imaging software to measure staining intensity across different samples. Be aware that expression patterns may vary across different cell types within the same tissue section .

How should I store and handle the NBPF family antibody to maintain its activity?

For optimal storage and handling, keep the antibody at -20°C or -80°C for long-term storage. Avoid repeated freeze-thaw cycles by aliquoting the antibody upon receipt. Working dilutions should be prepared fresh and used within 24 hours when stored at 4°C. The antibody is supplied in a buffer containing 50% glycerol, 0.5% BSA, and 0.02% sodium azide, which helps stabilize the protein .

When handling, use sterile techniques and avoid contamination. Before each use, allow the antibody to warm to room temperature and mix gently by inverting the tube several times. Centrifuge briefly if needed to collect the solution at the bottom of the tube. Do not vortex, as this may denature the antibody and reduce its effectiveness .

How do I assess cross-reactivity when using the NBPF family antibody?

To assess cross-reactivity, design control experiments using cell lines or tissues with known expression profiles of different NBPF family members. Since this antibody recognizes multiple NBPF proteins (NBPF1, NBPF9, NBPF10, NBPF12, NBPF14, NBPF15, NBPF16, and NBPF20), verification with isoform-specific antibodies or genetic approaches is recommended for precise identification .

Create a systematic cross-reactivity panel using overexpression systems for individual NBPF family members. Analyze the resulting data using densitometry for Western blots or quantitative image analysis for IHC to determine relative binding affinities. Complementary techniques such as mass spectrometry-based protein identification can provide definitive confirmation of which specific NBPF proteins are being detected in your experimental system .

What quantitative methods are appropriate for analyzing NBPF expression data?

For Western blot analysis, use densitometry software (ImageJ, Bio-Rad Image Lab) to quantify band intensities, normalizing to loading controls such as GAPDH or β-actin. For immunohistochemistry, employ digital pathology approaches with color deconvolution algorithms to separate and quantify DAB staining from counterstains .

For more advanced quantification, consider multiplex immunofluorescence to simultaneously detect multiple NBPF family members and correlate their expression with other cellular markers. Statistical analysis should include multiple biological and technical replicates, with appropriate tests for significance based on your experimental design. For studies comparing expression across different tissues or disease states, consider using heatmaps to visualize expression patterns of multiple NBPF family members .

How can I differentiate between specific NBPF isoforms in my experimental system?

Differentiating between specific NBPF isoforms requires a multi-faceted approach. Complement antibody-based detection with molecular techniques such as qRT-PCR using isoform-specific primers to quantify mRNA expression of individual family members. For protein detection, consider using 2D gel electrophoresis combined with Western blotting to separate NBPF isoforms based on both molecular weight and isoelectric point .

Another approach is to use CRISPR/Cas9 to systematically knock out individual NBPF genes and observe changes in antibody reactivity patterns. Alternatively, epitope mapping using synthetic peptides corresponding to unique regions of each NBPF protein can help determine the binding specificity of the antibody. For the most detailed analysis, mass spectrometry-based proteomics can definitively identify specific isoforms present in your samples .

How can the NBPF family antibody be used to investigate the role of these proteins in cancer progression?

To investigate NBPF proteins in cancer progression, design experiments comparing expression levels between normal, pre-malignant, and malignant tissues using tissue microarrays. The antibody can be used in IHC to analyze NBPF expression patterns in patient-derived xenografts or organoid models. Combine with markers of proliferation (Ki-67), apoptosis (cleaved caspase-3), or stemness (CD133) to correlate NBPF expression with specific cancer phenotypes .

For functional studies, use the antibody in immunoprecipitation experiments followed by mass spectrometry to identify NBPF-interacting proteins in cancer cells. Co-culture experiments can reveal how NBPF-expressing cancer cells influence the tumor microenvironment. Time-course studies during cancer progression can provide insights into the dynamic changes in NBPF expression and localization during tumorigenesis, potentially revealing critical points for therapeutic intervention .

What are the best approaches for studying NBPF proteins in neurodevelopmental disorders?

For neurodevelopmental disorder research, use the NBPF antibody in conjunction with neural cell type-specific markers (NeuN, GFAP, Olig2) to characterize expression patterns in brain tissue samples. In developmental studies, analyze NBPF expression across different stages of neurogenesis using neural progenitor models or developmental brain tissue sections .

For functional assessments, combine NBPF detection with live-cell imaging in neuronal cultures to correlate NBPF expression with neurite outgrowth, synapse formation, or electrophysiological properties. Patient-derived iPSCs differentiated into neural lineages provide an excellent model to study NBPF expression in the context of specific genetic backgrounds. Advanced techniques such as RNAscope in combination with immunofluorescence can provide single-cell resolution of both mRNA and protein expression in complex neural tissues .

How can I use the NBPF antibody in large-scale proteomics studies?

For large-scale proteomics, the NBPF antibody can be employed in immunoaffinity enrichment prior to mass spectrometry analysis. This approach can identify post-translational modifications and interaction partners of NBPF proteins. When designing such studies, create a comprehensive workflow that includes antibody-based enrichment, tryptic digestion, LC-MS/MS analysis, and bioinformatic processing .

For high-throughput screening, use the antibody in reverse-phase protein arrays (RPPA) to simultaneously assess NBPF expression across hundreds of samples. This method can be particularly valuable for biomarker discovery studies. To validate findings, implement orthogonal approaches such as proximity ligation assays to verify protein-protein interactions identified in proteomics screens. Integration of proteomics data with transcriptomics and genomics datasets can provide a systems-level understanding of NBPF function within cellular networks .

What are the known structural and functional differences between NBPF family members?

NBPF family members share significant sequence homology but differ in the number of DUF1220 domains they contain, which influences their functional properties. NBPF10, for example, is notably larger at 435.6 kDa compared to other family members. These proteins exhibit differential expression patterns across tissues, with some members showing more restricted expression profiles than others .

Functionally, while all NBPF proteins are implicated in cellular processes like proliferation and differentiation, specific members may have unique roles. NBPF1 has been linked to neurogenesis, while NBPF10 has been associated with brain size development. The table below summarizes key differences:

These structural and functional differences necessitate careful experimental design when studying specific family members .

How can I design experiments to assess the redundancy or unique functions of different NBPF proteins?

To assess functional redundancy or uniqueness, implement a systematic approach using CRISPR/Cas9-mediated knockout of individual NBPF genes followed by phenotypic analysis. Complementation experiments where individual NBPF proteins are re-expressed in a knockout background can reveal functional equivalence or distinction between family members .

For detailed functional characterization, design domain-swapping experiments between different NBPF proteins to identify which regions confer specific functions. RNA-seq analysis following individual knockdowns can reveal common or distinct transcriptional responses, providing insights into shared or unique signaling pathways. Protein interaction studies using BioID or proximity labeling approaches can identify common or unique binding partners for different NBPF family members, further elucidating their functional relationships .

What are the recommended controls when studying specific NBPF family members?

When studying specific NBPF family members, include both positive and negative controls to ensure experimental validity. For positive controls, use cell lines with confirmed expression of the specific NBPF member of interest, validated by qRT-PCR or RNA-seq data. For negative controls, utilize CRISPR knockout cell lines lacking the specific NBPF member under investigation .

Additionally, implement siRNA knockdown controls targeting unique regions of each NBPF transcript to verify specificity of observed effects. For antibody-based experiments, pre-absorption controls using recombinant peptides corresponding to specific NBPF epitopes can confirm binding specificity. When analyzing subcellular localization, include co-staining with organelle markers to precisely define the distribution patterns of specific NBPF proteins within cells. These comprehensive controls ensure the reliability and reproducibility of findings related to individual NBPF family members .