2D3F:
reference: High-resolution structures of collagen-like peptides [(Pro-Pro-Gly)(4)-Xaa-Yaa-Gly-(Pro-Pro-Gly)(4)]: Implications for triple-helix hydration and Hyp(X) puckering., Okuyama K, Hongo C, Wu G, Mizuno K, Noguchi K, Ebisuzaki S, Tanaka Y, Nishino N, Bachinger HP, Biopolymers. 2009 May;91(5):361-72. PMID: 19137577

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).