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. Author manuscript; available in PMC: 2008 Dec 11.
Published in final edited form as: Biochim Biophys Acta. 2006 May 4;1764(7):1252–1259. doi: 10.1016/j.bbapap.2006.04.009

Fig. 1.

Fig. 1

GCN4 bZIP in complex with the AP-1 DNA site [3]. DNA is the double helix at the bottom of the figure, and the bZIP is the vertical ribbon, α-helical dimer. The leucine zipper dimerizes into the coiled-coil structure shown at the top of the figure; the zipper then smoothly forks to either side of the DNA (hinge region), thus allowing the basic region dimer to bind opposite sides of the DNA major groove.