Anti-SDP1 antibodies enable researchers to detect and measure the SDP1 antigen in biological samples. This target is a reported synonym of the SNX9 gene, which encodes sorting nexin 9. This protein is known to function in endocytosis and intracellular protein transport, among other biological roles. The human version of SDP1 has a canonical amino acid length of 595 residues and a protein mass of 66.6 kilodaltons. It is reported to be localized in the cell membrane, cytoplasmic vesicles, Golgi, and cytoplasm of cells and widely expressed in many tissue types. SDP1 is a member of the Sorting nexin protein family.