6USJ:
reference: Bridging of nucleosome-proximal DNA double-strand breaks by PARP2 enhances its interaction with HPF1., Gaullier G, Roberts G, Muthurajan UM, Bowerman S, Rudolph J, Mahadevan J, Jha A, Rae PS, Luger K, PLoS One. 2020 Nov 3;15(11):e0240932. doi: 10.1371/journal.pone.0240932., eCollection 2020. PMID: 33141820

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