1MWQ:
reference: Structure of YciI from Haemophilus influenzae (HI0828) reveals a ferredoxin-like alpha/beta-fold with a histidine/aspartate centered catalytic site., Willis MA, Song F, Zhuang Z, Krajewski W, Chalamasetty VR, Reddy P, Howard A, Dunaway-Mariano D, Herzberg O, Proteins 2005 May 15;59(3):648-52. PMID: 15779043

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