RobynEYoungUSMC6364 RobynEYoungUSMC6364 17-12-2019 Biology contestada Collagens are NOT __________. A. found as bundles of double-helical polypeptides B. load-bearing proteins in the extracellular matrix C. the most abundant component of the extracellular matrix in animals D. high in glycine, hydroxylysine, and hydroxyproline