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. 2005 Jan 14;33(1):430–438. doi: 10.1093/nar/gki191

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© 2005, the authors Nucleic Acids Research, Vol. 33 No. 00 © Oxford University Press 2005; all rights reserved

The online version of this article has been published under an open access model. Users are entitled to use, reproduce, disseminate, or display the open access version of this article for non-commercial purposes provided that: the original authorship is properly and fully attributed; the Journal and Oxford University Press are attributed as the original place of publication with the correct citation details given; if an article is subsequently reproduced or disseminated not in its entirety but only in part or as a derivative work this must be clearly indicated. For commercial re-use permissions, please contact journals.permissions@oupjournals.org.

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Two modes of DNA bending. (a) The structure of V26A/M29A–DNA complex (right) and schematic diagram (left) stress gradual curvature by smooth bending. (b) The structure of M29F–DNA complex shows localization of curvature by kinked bending from minor groove of DNA. The contributions of each base-pair-step curvature to overall helix bending are listed with corresponding base-pair numbers. (c) Local base-pair step parameter, roll, for all eight Sac7d mutant–DNA binary structures, calculated using the X3DNA program. Note the largest roll at certain kinked step (G3pA4 in V26A/M29A, C2pG3 or A3pA4 in the others).