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. 2013 Jan 10;8(1):e53841. doi: 10.1371/journal.pone.0053841

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© 2013 Wang et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Scheme of conformational changes for helix1 of Smad1 in both Smad4+DNA+Smad1 (light pink) and Smad1+DNA+Smad1 (light blue) models with the distances between Pro12-Arg16 residues of helix1 and Gln25 residue of helix2.