4O6W:
reference: Mono-anionic phosphopeptides produced by unexpected histidine alkylation exhibit high plk1 polo-box domain-binding affinities and enhanced antiproliferative effects in hela cells., Qian WJ, Park JE, Lim D, Lai CC, Kelley JA, Park SY, Lee KW, Yaffe MB, Lee KS, Burke TR Jr, Biopolymers. 2014 Nov;102(6):444-55. doi: 10.1002/bip.22569. PMID: 25283071

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