Anti-B-Cell Receptor-Associated Protein 31 antibodies enable researchers to detect and measure the B-Cell Receptor-Associated Protein 31 antigen in biological samples. This target is a reported synonym of the BCAP31 gene, which encodes B cell receptor associated protein 31. This protein is known to function in the apoptotic pathway and Golgi transport, among other biological roles. The human version of B-Cell Receptor-Associated Protein 31 has a canonical amino acid length of 246 residues and a protein mass of 28 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the ER of cells and widely expressed in many tissue types. B-Cell Receptor-Associated Protein 31 is a member of the BCAP29/BCAP31 protein family.