SALM3/LRFN4 in Human Brain. SALM3/LRFN4 was detected in immersion fixed paraffin-embedded sections of human brain (cerebellum) using Mouse Anti-Human SALM3/LRFN4 Monoclonal Antibody (Catalog # MAB5445) at 15 µg/mL overnight at 4 °C. Before incubation with the primary antibody, tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.