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Figure 1.
Overall structures of the MecI --mec complex. (a) The
horizontal 32 bp DNA fragment of the mec operator with two
dimeric MecI repressors bound. The DNA molecule is shown as
sticks and the protein as ribbons, with [alpha]-helices and
[beta]-strands labeled in the 'up' and 'down' dimers,
respectively. (b) The vertical 24 bp DNA fragment with unpaired
3[prime prime or minute]-ends, also bound to two repressors. (c)
The virtual double helix formed by the horizontal DNA fragments
via lattice translations of the trigonal crystal. Acta
Crystallogr Sect F Struct Biol Cryst Commun. 2006 April 1; 62(Pt
4): 320–324. Published online 2006 March 25. doi:
10.1107/S1744309106009742. Copyright [copyright] International
Union of Crystallography 2006
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