1Z2B:
reference: Structural basis for the regulation of tubulin by vinblastine., Gigant B, Wang C, Ravelli RB, Roussi F, Steinmetz MO, Curmi PA, Sobel A, Knossow M, Nature. 2005 May 26;435(7041):519-22. PMID: 15917812

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