PER3 Antibody
Product Specs
**Constituents:** 50% Glycerol, 0.01M PBS, pH 7.4
Target Background
- Removal of H2O2
- Oxidation of toxic reductants
- Biosynthesis and degradation of lignin
- Suberization
- Auxin catabolism
- Response to environmental stresses such as wounding, pathogen attack, and oxidative stress.
These functions may be dependent on specific isozymes/isoforms present in each plant tissue.
- Research has indicated that RCI3 is upregulated in response to potassium deprivation. This suggests that RCI3 plays a role in the production of reactive oxygen species (ROS) under potassium deficiency, and that RCI3-mediated ROS production influences the regulation of AtHAK5 expression. PMID: 20139158
Q&A
Basic Research Questions
How should researchers validate PER3 antibody specificity in circadian rhythm studies?
Validation requires a multi-step approach:
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Positive/Negative Controls: Use cell lines with known PER3 expression (e.g., synchronized HEK293T) and CRISPR-generated PER3-knockout models .
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Orthogonal Methods: Compare Western blot (WB) results with RNAi-mediated PER3 knockdown followed by qPCR .
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Epitope Mapping: Verify antibody binding to specific domains (e.g., aa 21–70 in human PER3) using peptide-blocking assays .
What criteria define optimal PER3 antibody selection for immunohistochemistry (IHC)?
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Species Reactivity: Prioritize antibodies validated in the target species (e.g., ab224594 for human/mouse/rat ).
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Fixation Compatibility: Test antibody performance in paraffin-embedded vs. frozen sections, as PER3 localization (nuclear/cytoplasmic) varies by tissue type .
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Cross-Reactivity Screening: Confirm absence of binding to PER1/PER2 using isoform-specific knockout samples .
How do researchers resolve discrepancies in PER3 expression levels across experimental models?
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Circadian Timing: Sample tissues at multiple Zeitgeber Time (ZT) points due to PER3’s oscillatory expression .
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Post-Translational Modifications: Use phosphatase inhibitors during lysis to preserve phosphorylation-dependent epitopes .
Advanced Research Questions
What experimental designs address PER3 antibody cross-reactivity with splice variants?
How can PER3 antibodies be optimized for multiplex circadian rhythm assays?
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Dye Conjugation: Use antibodies like STJ95029 (unconjugated IgG) for custom labeling with fluorophores matching imaging systems .
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Signal Deconvolution: Pair PER3 antibodies with phase-specific markers (e.g., BMAL1-CLOCK for anti-phase detection) .
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Algorithmic Normalization: Quantify PER3 rhythms using open-source tools (e.g., Metacycle R package) to account for antibody batch variability .
What methodologies resolve contradictory PER3 localization data in cancer studies?
Technical Considerations
How are PER3 antibodies validated for chromatin immunoprecipitation (ChIP)?
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Sonication Efficiency: Optimize chromatin shearing to ~200–500 bp fragments to expose PER3-binding sites .
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Competition with Synthetic DNA: Spike-in exogenous DNA-antibody complexes to normalize batch effects .
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Target Gene Correlation: Validate ChIP signals against PER3-regulated transcripts (e.g., CCND1, DBP) via RNA-seq .
What controls are critical for PER3 knockout phenotype rescue experiments?
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Endogenous Tagging: Use CRISPR-HDR to insert epitope tags (e.g., HA) alongside PER3 coding sequence .
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Rescue Construct Titration: Express PER3 at physiological levels (≤2× endogenous) to avoid overexpression artifacts .
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Phase Monitoring: Track rescue efficiency via live-cell luciferase reporters (e.g., Per3-luc) .
