4EMR:
reference: First structural evidence of sequestration of mRNA cap structures by type 1 ribosome inactivating protein from Momordica balsamina., Kushwaha GS, Yamini S, Kumar M, Sinha M, Kaur P, Sharma S, Singh TP, Proteins. 2013 May;81(5):896-905. doi: 10.1002/prot.24248. Epub 2013 Feb 25. PMID: 23280611

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