This brain neuropeptide was found to modulate the action of morphine. It was found to decrease tail-flick latency in rats. This octapeptide was more active than the brain neuropeptide II in morphine modulation..
Yang, H. et al. PNAS 82, 7757 (1985).
Sequence (One-Letter Code)
Sequence (Three-Letter Code)
H - Phe - Leu - Phe - Gln - Pro - Pro - Arg - Phe - NH2