6FAC:
reference: Crystal structure of the spliceosomal DEAH-box ATPase Prp2., Schmitt A, Hamann F, Neumann P, Ficner R, Acta Crystallogr D Struct Biol. 2018 Jul 1;74(Pt 7):643-654. doi:, 10.1107/S2059798318006356. Epub 2018 Jun 8. PMID: 29968674

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