Anti-DERP9 antibodies enable researchers to detect and measure the DERP9 antigen in biological samples. This target is a reported synonym of the VPS25 gene, which encodes vacuolar protein sorting 25 homolog. This protein is known to function in autophagy pathways, among other biological roles. The human version of DERP9 has a canonical amino acid length of 176 residues and a protein mass of 20.7 kilodaltons. It is reported to be localized in the nucleus and cytoplasm of cells. DERP9 is a member of the VPS25 protein family.