4K3E:
reference: Reshaping antibody diversity., Wang F, Ekiert DC, Ahmad I, Yu W, Zhang Y, Bazirgan O, Torkamani A, Raudsepp T, Mwangi W, Criscitiello MF, Wilson IA, Schultz PG, Smider VV, Cell. 2013 Jun 6;153(6):1379-93. doi: 10.1016/j.cell.2013.04.049. PMID: 23746848

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