| 1YFR: reference: Breaking sieve for steric exclusion of a noncognate amino acid from active site of a tRNA synthetase., Swairjo MA, Schimmel PR, Proc Natl Acad Sci U S A 2005 Jan 25;102(4):988-93. Epub 2005 Jan 18. PMID: 15657145 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).