MuSK controls where motor axons grow and form synapses.

Abstract excerpt

Motor axons approach muscles that are regionally prespecialized, as acetylcholine receptors are clustered in the central region of muscle before and independently of innervation. This muscle prepattern requires MuSK, a receptor tyrosine kinase that is essential for synapse formation. It is not known how muscle prepatterning is established, and whether motor axons recognize this prepattern. Here we show that...

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