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.