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Ribbon structure of HIV-1 INT with the Mg2+ cofactor and the (a) 3trans,5trans-diCQA, (b) 3cis,5trans-diCQA, (c) 3trans,5cis-diCQA, and (d) 3cis,5cis-diCQA ligand. Molecular graphics were created using YASARA (http://www.yasara.org/) and POVRay (http://www.povray.org/).
