Anti-SIRL1 antibodies enable researchers to detect and measure the SIRL1 antigen in biological samples. This target is a reported synonym of the VSTM1 gene, which encodes V-set and transmembrane domain containing 1. The human version of SIRL1 has a canonical amino acid length of 236 residues and a protein mass of 26.1 kilodaltons, although 3 isoforms have been identified. It is reported to be a secreted protein.