4M9V:
reference: DNA Recognition of 5-Carboxylcytosine by a Zfp57 Mutant at an Atomic Resolution of 0.97 A, Liu Y, Olanrewaju YO, Zhang X, Cheng X, Biochemistry. 2013 Nov 20. PMID: 24236546

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