Drosophila wingless generates cell type diversity among engrailed expressing cells.

States that the subdivisions of the Drosophila embryo, called parasegments, are defined by the interface between cells expressing the homeoprotein Engrailed and cells expressing the secreted protein Wingless. Examination of the generation of cell-type diversity within parasegments by focusing on the choice of cell fate made by the engrailed (en)-expressing cells.