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1: Neuropeptide S as a novel arousal promoting peptide transmitter. Reinscheid RK, Xu YL; FEBS J. 2005;272:5689-5693. PMID:16279934

2: Peptide S is a novel potent inhibitor of voluntary and fast-induced food intake in rats. Beck B, Fernette B, Stricker-Krongrad A; Biochem Biophys Res Commun. 2005;332:859-865. PMID:15919054