The Drosophila beaten path gene encodes a novel secreted protein that regulates defasciculation at motor axon choice points.

Abstract excerpt

In the Drosophila embryo, at specific choice points along the major motor nerves, subsets of motor axons defasciculate and then steer into their muscle target regions. Here we describe the analysis of beaten path (beat), a gene required for the selective defasciculation of motor axons at these choice points. In beat mutant embryos, motor axons fail to defasciculate and bypass their targets. This phenotype is...

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