Incorrect Antibody Diluent Selection

Symptom

Suboptimal signal intensity or background issues despite correct antibody concentration. Different antibodies show dramatically different performance in TBST/5% NGS versus SignalStain Antibody Diluent.

1. 1 Using TBST/5% Normal Goat Serum when SignalStain Antibody Diluent is recommended for specific antibody
2. 2 Using SignalStain Antibody Diluent when TBST/5% NGS is optimal for specific antibody
3. 3 Antibody concentration not re-titrated after switching to non-recommended diluent

1. 1 Always use recommended primary antibody diluent as specified on product datasheet (e.g., Phospho-Akt #4060 requires SignalStain Diluent; Phospho-EGFR #4407 requires TBST/5% NGS)
2. 2 If using alternative diluent, perform complete antibody titration to optimize concentration
3. 3 Check product datasheet and product page for specific diluent recommendations before starting experiment

Related Video (3)

Bilibili (China-Accessible Mirrors) ★ 95

Immunohistochemistry on Paraffin-Embedded Sections (CST Demo)

"CST-based IHC protocol on paraffin sections directly addresses the antibody diluent selection and reagent choices that caused this failure"

Cell Signaling Technology ★ 88

Immunohistochemistry Protocol for Paraffin embedded Tissue Sections

"Official CST IHC protocol video with access to guides covering antibody dilution and diluent selection for paraffin-embedded tissue"

Bilibili (China-Accessible Mirrors) ★ 72

Complete IHC Immunohistochemistry Protocol for Beginners

"Comprehensive IHC workflow demonstration that would show proper reagent handling and diluent application throughout the staining procedure"