Anti-CD277 antibodies enable researchers to detect and measure the CD277 antigen in biological samples. This target is a reported synonym of the BTN3A1 gene, which encodes butyrophilin subfamily 3 member A1. This protein is known to function in adaptive immune responses, among other biological roles. The human version of CD277 has a canonical amino acid length of 513 residues and a protein mass of 57.7 kilodaltons, although 4 isoforms have been identified. It is reported to be localized in the cell membrane of cells and widely expressed in many tissue types. CD277 is a member of the BTN/MOG protein family.