Anti-SARA antibodies enable researchers to detect and measure the SARA antigen in biological samples. This target is a reported synonym of the ZFYVE9 gene, which encodes zinc finger FYVE-type containing 9. This protein is known to function in endocytosis, among other biological roles. The human version of SARA has a canonical amino acid length of 1425 residues and a protein mass of 156.4 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the cytoplasm of cells and notably expressed in many tissues, such as the cerebral cortex and testis.