Task: Text Categorization
Input (English): Cross linking in this protein occurs when two oxidized derivatives of lysine link up; the amount of cross linking that occurs in this protein increases with age. This protein contains three left handed helices which combine to form a triple helix. About one third of this protein is amino acid is glycine; this protein also consists of hydroxyproline. A lack of ascorbic acid causes an inability to synthesize hydroxyproline, causing a breakdown of this protein in the gums in a disease called scurvy. For 10 points, name this elastic protein found in connective tissue, skin and cartilage.
Output (English): Science