6NHT:
reference: A 3.8 A resolution cryo-EM structure of a small protein bound to an imaging scaffold., Liu Y, Huynh DT, Yeates TO, Nat Commun. 2019 Apr 23;10(1):1864. doi: 10.1038/s41467-019-09836-0. PMID: 31015551

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