3WKS:
reference: Ancient translation factor is essential for tRNA-dependent cysteine biosynthesis in methanogenic archaea., Liu Y, Nakamura A, Nakazawa Y, Asano N, Ford KA, Hohn MJ, Tanaka I, Yao M, Soll D, Proc Natl Acad Sci U S A. 2014 Jul 22;111(29):10520-5. doi:, 10.1073/pnas.1411267111. Epub 2014 Jul 7. PMID: 25002468

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