1AJ3:
reference: Solution structure of the spectrin repeat: a left-handed antiparallel triple-helical coiled-coil., Pascual J, Pfuhl M, Walther D, Saraste M, Nilges M, J Mol Biol 1997 Oct 31;273(3):740-51. PMID: 9356261

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