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Expression of the fushi tarazu gene as detected by in situ hybridization. The messenger RNA forms a pattern of 7 stripes, expressed in every other parasegment of the early Drosophila embryo reflecting the segmental body plan. Expression of the engrailed gene in the posterior compartment of every body segment of the Drosophila embryo. Antennapedia homeodomain bound to DNA . Structure of the Antennapedia homeodomain DNA complex as determined by nuclear magnetic resonance spectroscopy.