Anti-p75(NTR) antibodies enable researchers to detect and measure the p75(NTR) antigen in biological samples. This target is a reported synonym of the NGFR gene, which encodes nerve growth factor receptor. This protein is known to function in the apoptotic pathway and axon guidance, among other biological roles. The human version of p75(NTR) has a canonical amino acid length of 427 residues and a protein mass of 45.2 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane of cells and notably expressed in many tissues, such as the colon and testis. Other names for this target antigen include CD271, CD271, and Gp80-LNGFR.