5G2X:
reference: Structure of a group II intron in complex with its reverse transcriptase., Qu G, Kaushal PS, Wang J, Shigematsu H, Piazza CL, Agrawal RK, Belfort M, Wang HW, Nat Struct Mol Biol. 2016 May 2. doi: 10.1038/nsmb.3220. PMID: 27136327

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