Immunogen sequence: VWTLVDIDRR DPLVVAALHL CIALGYANSS LNPVLYAFLD ENFKRCFRQL CRKPCGRPDP SSFSRAREAT ARERVTACTP SDGPGGGAAA; Positive Samples: Mouse brain, Mouse liver; Cellular Location: Cell membrane, Multi-pass membrane protein. OPRD1 is an Opioid Receptor