Most abundant aminoacid in collagen is
COLLAGEN Collagens are triple helices formed by amino acid chains where every third residue is glycine (Gly-X-Y), with a high likelihood of proline and hydroxyproline/ hydroxylysine in the X and Y positions, respectively. Ref:- Review of Dermatology by Alikhan; pg num:-7
Proline
Lysine
Threonine
Glycine
Anatomy of skin