Anti-PPNPB antibodies enable researchers to detect and measure the PPNPB antigen in biological samples. This target is a reported synonym of the NPB gene, which encodes neuropeptide B. This protein is known to function in GPCR signaling pathways, among other biological roles. The human version of PPNPB has a canonical amino acid length of 125 residues and a protein mass of 13.1 kilodaltons. It is reported to be a secreted protein. PPNPB is a member of the Neuropeptide B/W protein family.