1AQ5:
reference: NMR structure of a parallel homotrimeric coiled coil., Dames SA, Kammerer RA, Wiltscheck R, Engel J, Alexandrescu AT, Nat Struct Biol. 1998 Aug;5(8):687-91. PMID: 9699631

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