4MMM:
reference: Comparing Binding Modes of Analogous Fragments Using NMR in Fragment-Based Drug Design: Application to PRDX5., Aguirre C, Brink TT, Guichou JF, Cala O, Krimm I, PLoS One. 2014 Jul 15;9(7):e102300. doi: 10.1371/journal.pone.0102300., eCollection 2014. PMID: 25025339

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