sentences:  In addition, it plays a role in paracrine and autocrine regulation of certain types of cells.This gene is composed of five exons.Exons 1 and 2 encode the 5' UTR and signal peptide, respectively; exon 4 encodes an adenylate cyclase-activating polypeptide 1-related peptide; and exon 5 encodes the mature peptide and 3' UTR.