This protein can be cleaved by enzymes produced by Clostridium bacteria, which can be used to treat Peyronie’s disease. FACIT (“Facit”) is one alternate form of this protein. This protein takes the form of a triple helix with abundant glycine (10[1])and proline residues. This protein forms numerous cross-links between cells and is synthesized by fibroblasts. A lack of vitamin C prevents the formation of this protein, causing scurvy. Once isolated from animals, this protein can be processed into gelatin. For 10 points, name this structural protein found in connective tissue like cartilage and bone, the most abundant in the human body. ■END■