| 3QTC: reference: Stereochemical Basis for Engineered Pyrrolysyl-tRNA Synthetase and the Efficient in Vivo Incorporation of Structurally Divergent Non-native Amino Acids., Takimoto JK, Dellas N, Noel JP, Wang L, ACS Chem Biol. 2011 May 5. PMID: 21545173 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).