4OJM:
reference: An in vitro peptide complementation assay for CYT-18-dependent group I intron splicing reveals a new role for the N-terminus., Geng C, Paukstelis PJ, Biochemistry. 2014 Mar 4;53(8):1311-9. doi: 10.1021/bi401614h. Epub 2014 Feb 24. PMID: 24520960

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