Immunohistochemistry Antibodies matched to the biological target, specimen type, and assay conditions. Begin by confirming the antibody’s validated application for IHC and reviewing host species, expected staining pattern (nuclear, cytoplasmic, membranous), and recommended controls. For tissue samples, prioritize antibodies that have been tested across formalin-fixed, paraffin-embedded workflows or other specific processing methods used in your lab. When you plan a multi-marker panel, consider cross-reactivity risk and the compatibility of antibody clones with your detection system. If you are comparing results across studies, standardize the antibody lot selection and record key details such as dilution, incubation time, and antigen retrieval parameters to support reproducibility.
Sample Preparation and Antigen Retrieval Best Practices
Optimization, Controls, and Signal Verification
ProSci Antibodies and adjust in a controlled dilution series if signal intensity is weak or if background is high. Monitor key variables: incubation duration, temperature, wash stringency, and detection reagent conditions. Use proper controls every run: include a positive control tissue known to express the target, a negative control using an isotype-matched antibody or omitting the primary antibody, and—when relevant—an internal control region within the same specimen. Evaluate staining using both localization and morphology; true positives should align with expected cellular compartments and tissue architecture. If results are inconsistent, verify that fixation and retrieval conditions match the antibody’s validated performance claims and confirm that the detection system is functioning with your chosen chromogen.
