Anti-HSRG1 antibodies enable researchers to detect and measure the HSRG1 antigen in biological samples. This target is a reported synonym of the MON1B gene, which encodes MON1 homolog B, secretory trafficking associated. This protein is known to function in vesicle-mediated transport, among other biological roles. The human version of HSRG1 has a canonical amino acid length of 547 residues and a protein mass of 59.2 kilodaltons, although 2 isoforms have been identified. It is reported to be widely expressed in many tissue types. Other names for this target antigen include SAND2.