Species predicted to react based on 100% sequence homology: Bovine, Horse。BCL9 Antibody recognizes endogenous levels of total BCL9 protein. The antibody also cross-reacts with an unidentified protein of 21 kDa in some cell lines.Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding His138 of human BCL9 protein. Antibodies are purified by protein A and peptide affinity chromatography.