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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Compounds 3a, 3b (light and dark grey respectively) and 4e (orange) docked at the dimer interface of a tubulin heterodimer (PDB code 1TUB) with chains coloured blue and green.