T/F Detection (visualization) part of IHC should be used to compensate for insufficient antibody concentration.

• A. True
• B. False
• C. Not applicable
• D. Not sure

Answer: (B)

In IHC, the visualization step is meant to reveal where the antibody has bound by converting that binding into a visible signal. It is not a remedy for too little antibody. If the primary antibody concentration is insufficient, there will be few antigen–antibody complexes and the signal will be weak regardless of how sensitive the detection system is. Amplification or sensitive detection can increase signal, but it also risks amplifying background and nonspecific staining if binding is inadequate, leading to misleading results. The proper approach is to optimize the antibody concentration and other factors (antigen retrieval, blocking, incubation, controls) so binding is robust, and then use detection to visualize the specific signal appropriately.