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Immunohistochemistry (CST Guide) moderate

Endogenous Biotin Interference

Symptom
High background staining specifically in kidney, liver, or other biotin-rich tissues when using biotin-based detection. Background not resolved by standard blocking procedures.
Common Causes
  1. 1 Biotin-based detection system used on tissues with high endogenous biotin levels (kidney, liver)
  2. 2 Endogenous biotin binds avidin/streptavidin detection reagents creating false-positive signal
  3. 3 No biotin blocking step performed prior to primary antibody incubation
Solutions
  1. 1 Switch to polymer-based detection system (SignalStain Boost IHC Detection Reagents #8114 or #8125) which eliminates biotin interference
  2. 2 If biotin-based detection must be used, perform biotin block after normal blocking procedure and prior to primary antibody incubation
  3. 3 Avoid biotin-based systems entirely for kidney and liver tissue IHC experiments
Related Video (3)
Bilibili (China-Accessible Mirrors) ★ 95
Immunohistochemistry on Paraffin-Embedded Sections (CST Demo)
"Direct CST-based IHC protocol on paraffin-embedded tissue sections; teaches standard procedures where biotin-based detection systems are applied and where endogenous biotin interference would manifest"
Cell Signaling Technology ★ 85
Better IHC Step 1: Antigen Retrieval
"Focused troubleshooting series on improving IHC staining quality; addresses common background and staining artifacts that researchers encounter with detection optimization."
Cell Signaling Technology ★ 78
Immunohistochemistry Protocol for Paraffin embedded Tissue Sections
"CST's official IHC protocol video for paraffin-embedded sections with link to comprehensive IHC guide; foundational resource for understanding standard biotin-based detection workflows where the failu"
Source: cellsignal.com ↗
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