Western blot shows lysates of K562 human chronic myelogenous leukemia cell line and DU145 human prostate carcinoma cell line. PVDF membrane was probed with 1 µg/mL of Human/Mouse SUMO2/3/4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3020) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF109). A specific band was detected for SUMO2/3/4 at approximately 12 kDa (as indicated) along with multiple sumoylated proteins. This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 4.