Discrepancies often arise from:
Fixation artifacts: Over-fixation masks epitopes; optimize permeabilization (e.g., 0.1% Triton X-100, 10 min) .
Antibody cross-reactivity: Validate against Arabidopsis T-DNA insertion lines (e.g., SALK_012345) to confirm absence of off-target binding .
Post-translational modifications: Use phosphatase/kinase inhibitors during extraction to preserve native protein states .
Epitope prediction: Use ABCpred or BepiPred to map antibody-binding regions on At3g21170 (Uniprot: Q9LM89) .
Structural docking: Model antibody-antigen interactions with ClusPro for mutagenesis-guided validation .
Chromatin shearing: Target DNA fragment size = 200–500 bp (confirmed by Bioanalyzer) .
Blocking agents: 5% BSA + 0.1% fish gelatin reduces non-specific binding in plant tissues .
Multiplex validation: Combine with RNA-seq to correlate protein occupancy with gene expression (e.g., stress-responsive genes WRKY53, HSFA2) .
Implement a decision tree:
Reprodubility check: Repeat assay across 3 biological replicates.
Orthogonal validation: Compare with CRISPR-Cas9 knockout lines or independent antibodies (e.g., anti-HA tagged At3g21170) .
Quantitative thresholds: Define positivity criteria (e.g., ≥2-fold signal vs. IgG control) .
Yes, through: