Anti-B56B antibodies enable researchers to detect and measure the B56B antigen in biological samples. This target is a reported synonym of the PPP2R5B gene, which encodes protein phosphatase 2 regulatory subunit B'beta. This protein is known to function in neuronal development and the regulation of transcription, among other biological roles. The human version of B56B has a canonical amino acid length of 497 residues and a protein mass of 57.4 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cytoplasm of cells and notably expressed in many tissues, such as the cerebellum and colon. Other names for this target antigen include B56beta and PR61B.