1JFF:
reference: Refined structure of alpha beta-tubulin at 3.5 A resolution., Lowe J, Li H, Downing KH, Nogales E, J Mol Biol. 2001 Nov 9;313(5):1045-57. PMID: 11700061

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