Anti-RTP antibodies enable researchers to detect and measure the RTP antigen in biological samples. This target is a reported synonym of the NDRG1 gene, which encodes N-myc downstream regulated 1. This protein is known to function in the cellular response to hypoxia and DNA damage pathways, among other biological roles. The human version of RTP has a canonical amino acid length of 394 residues and a protein mass of 42.8 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the cell membrane, nucleus, and cytoplasm of cells and widely expressed in many tissue types. RTP is a member of the NDRG protein family.