Motilin is important for interdigestive gastrointestinal motility and indirectly causes the contraction of duodenal and colonic smooth muscle.Human, Porcine: H-Phe-Val-Pro-Ile-Phe-Thr-Tyr-Gly-Glu-Leu-Gln-Arg-Met-Gln-Glu-Lys-Glu-Arg-Asn-Lys-Gly-Gln-OH or H-FVPIFTYGELQRMQEKERNKGQ-OH