Alanine 9.6%, arginine 8.6%, aspartic acid 5.3%, glutamic acid 9.3%, glycine 22.8%, histidine 1.1%, hydroxylysine 0.6%, hydroxyproline 9.9%, isoleucine 1.2%, leucine 2.7%, lysine 3.5%, methionine 1.4%, phenylalanine 2.2%, proline 12.5%, serine 3.5%, threonine 2.8%, tyrosine 0.8%, valine 2.1%