Anti-SAX1 antibodies enable researchers to detect and measure the SAX1 antigen in biological samples. This target is a reported synonym of the VAMP1 gene, which encodes vesicle associated membrane protein 1. This protein is reported to be involved in targeting and/or fusion of transport vesicles to their target membrane. The human version of SAX1 has a canonical amino acid length of 118 residues and a protein mass of 12.9 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the cytoplasmic vesicles and mitochondria of cells and notably expressed in many tissues, such as the cerebellum and cerebral cortex. SAX1 is a member of the Synaptobrevin protein family.