3UJ3:
reference: Crystal structure of an intermediate of rotating dimers within the synaptic tetramer of the G-segment invertase., Ritacco CJ, Kamtekar S, Wang J, Steitz TA, Nucleic Acids Res. 2013 Feb 1;41(4):2673-82. doi: 10.1093/nar/gks1303. Epub 2012 , Dec 28. PMID: 23275567

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