6BHV:
reference: NAD(+) analog reveals PARP-1 substrate-blocking mechanism and allosteric communication from catalytic center to DNA-binding domains., Langelier MF, Zandarashvili L, Aguiar PM, Black BE, Pascal JM, Nat Commun. 2018 Feb 27;9(1):844. doi: 10.1038/s41467-018-03234-8. PMID: 29487285

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