Fig. (IMAGE) Moscow Institute of Physics and Technology Caption 1. This is a tubulin dimer with the colchicine site shown in green 2. This is a a molecule (blue) of the thienopyridine class bound to a tubulin dimer. Credit MIPT Press Office Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.