Anti-SES1 antibodies enable researchers to detect and measure the SES1 antigen in biological samples. This target is a reported synonym of the SCRN1 gene, which encodes secernin 1. This protein is known to function in exocytosis and proteolysis, among other biological roles. The human version of SES1 has a canonical amino acid length of 414 residues and a protein mass of 46.4 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the cytoplasm of cells and notably expressed in the tonsil, colon, and cerebral cortex. SES1 is a member of the Peptidase C69 protein family.