6HRJ:
reference: The structure of PghL hydrolase bound to its substrate poly-gamma-glutamate., Ramaswamy S, Rasheed M, Morelli CF, Calvio C, Sutton BJ, Pastore A, FEBS J. 2018 Dec;285(24):4575-4589. doi: 10.1111/febs.14688. Epub 2018 Nov 19. PMID: 30387270

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