Abstract
The digestive tract exhibits region-specific morphology and cytodifferentiation along the anteroposterior axis. We analyzed the spatial expression patterns of Hox genes belonging to the HoxA and HoxB cluster (Hoxa-4 approximately a-9, Hoxb-5 approximately b-9) in the developing chick digestive tract. The expression domains of these Hox genes correlated with morphological subdivision of the digestive tract along the anteroposterior axis.
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