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)

Cell Signaling Technology ★ 80

Immunohistochemistry Protocol for Paraffin embedded Tissue Sections

"Directly shows CST's IHC protocol where SignalStain diluent is demonstrated for paraffin sections."

Bilibili (China-Accessible Mirrors) ★ 75

Immunohistochemistry on Paraffin-Embedded Sections (CST Demo)

"CST's step-by-step IHC demo includes antibody dilution steps, relevant to diluent choice."

Bilibili (China-Accessible Mirrors) ★ 60

Immunohistochemistry Experiment (IHC) Protocol

"Bench-level IHC protocol walkthrough gives context for when diluent issues arise."