2.Collagen and elastin Collagen is the skeleton of ECM The most abundant protein in human. ■ Structure:Triple helix of 3 a-polypeptide strands,the sequence is repeate of Gly-X-Y; There're many types of a strands with different kinds of combination style. Pri-peptide-remove signal peptide-add prepeptide on each ends.—Hydroxylation-—cross link at C terminal(procollagen)-secreted outside-remove prepeptide-self-assembly-mature collagen. This document is produced by trial version of Print2Flash.Visit www.print2flash.com for more information