<prompt> Amino-acid expressed maximally in collagen?Tyrosine phenylalanineAlanine aspaic acidGlycine cysteineProline hydroxyproline  <response>: Ans. is d i.e., Proline hydroxyprolineGlycine 33, proline 10, hydroxyproline, lysine and hydroxylysine are the predominant amino acids in collagen. Collagen. 