Add time:08/11/2019         Source:sciencedirect.com

Engrailed is expressed in subsets of interneurons that do not express Connectin or appreciable neuroglian (cas 127496-12-2), whereas other neurons that are Engrailed negative strongly express these adhesion molecules. Connectin and Neuroglian expression are virtually eliminated in interneurons when engrailed expression is driven ubiquitously in neurons, and greatly increased when engrailed genes are lacking in mutant embryos. The data suggest that Engrailed is normally a negative regulator of Connectin and neuroglian. These are the first two “effector” genes identified in the nervous system of Drosophila as regulatory targets for Engrailed. We argue that differential Engrailed expression is crucial in determining the pattern of expression of cell adhesion molecules and thus constitutes an important determinant of neuronal shape and perhaps connectivity.

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