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Immunohistochemistry (CST Guide) moderate

Suboptimal Primary Antibody Incubation

Symptom
Inconsistent or weak staining results despite following protocol. Staining intensity varies between experiments using same antibody lot and tissue type.
Common Causes
  1. 1 Primary antibody incubation time shorter than validated protocol (CST antibodies validated for overnight at 4°C)
  2. 2 Incubation temperature not controlled or inconsistent
  3. 3 Deviation from rigorously tested, product-specific protocol
Solutions
  1. 1 Follow CST validated protocol: incubate primary antibody overnight at 4°C for optimal, consistent results
  2. 2 Maintain consistent incubation temperature (4°C) across all experiments
  3. 3 Refer to product-specific datasheet for rigorously tested incubation conditions; do not modify without re-validation
Related Video (3)
Cell Signaling Technology ★ 90
Immunohistochemistry Protocol for Paraffin embedded Tissue Sections
"CST-approved paraffin IHC protocol directly shows correct primary antibody incubation steps and durations."
Bilibili (China-Accessible Mirrors) ★ 85
Immunohistochemistry on Paraffin-Embedded Sections (CST Demo)
"CST demo of IHC on paraffin sections covers antigen retrieval and subsequent staining, contextualizing proper incubation timing."
Bilibili (China-Accessible Mirrors) ★ 70
Complete IHC Immunohistochemistry Protocol for Beginners
"Beginner IHC protocol explains the full workflow including primary antibody incubation, helping to spot where incubation time might be shortened."
Source: cellsignal.com ↗
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