3CM5:
reference: Crystal Structure of CRN-4: Implications for Domain Function in Apoptotic DNA Degradation., Hsiao YY, Nakagawa A, Shi Z, Mitani S, Xue D, Yuan HS, Mol Cell Biol. 2009 Jan;29(2):448-57. Epub 2008 Nov 3. PMID: 18981218

This OCA Structure page
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