4I3T:
reference: Structure and function of phosphonoacetaldehyde dehydrogenase: the missing link in phosphonoacetate formation., Agarwal V, Peck SC, Chen JH, Borisova SA, Chekan JR, van der Donk WA, Nair SK, Chem Biol. 2014 Jan 16;21(1):125-35. doi: 10.1016/j.chembiol.2013.11.006. Epub, 2013 Dec 19. PMID: 24361046

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