In embryos, from stage 9, expressed in parasegments 2-14; initially expressed in narrow stripe at posterior boundary of each parasegment; expression spreads anteriorly within parasegment, but (especially in parasegments 7-14) remains strongest in the posterior. In later embryos, stong expression in the CNS; within each parasegment, is more extensive in parasegments 2-6, more restricted in parasegments 7-14.
Generated to study the repression of hb binding sites on BXD mediated activity.