IHC staining of FFPE human lymphoma tissue using anti-ROR1 mouse monoclonal antibody (TA806841) and Polink-2 HRP polymer detection kit (D22-110). Heat-induced epitope retrieval by EDTA solution buffer pH 8.0 (B04C-100) at 120°C for 3 min. The brown stain indicates positive stain, blue is the counter stain.