Background: Motilin, a 22-amino acid brain-gut peptide, is released by the endocrine cell in the mucosa of the upper part of the small intestine during the intergestive state.

• 背景资料：胃动素(Motilin,MT)是由22个氨基酸组成的脑肠肽，由小肠粘膜上部的内分泌细胞分泌，在消化间期呈周期性释放。