-Gelatin (processed collagen)
-Collagen
- structural protein in animals' connective tissue, skin, and bones
- makes up 1/3 protein in human body
- composed of glycin, proline, and hydroxyproline
- three polypeptide chains
- held together by hydrogen bonding
http://pubs.acs.org/cen/whatstuff/stuff/8120jello.html
