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Neurexin in Embryonic Drosophila Neuromuscular JunctionsChen, Kaiyun; Gracheva, Elena O.; Yu, Szi-Chieh; Sheng, Qi; Richmond, Janet; Featherstone, David E.; Mei, Lin; Department of Neurology; College of Graduate Studies (2010-06-14)Background: Neurexin is a synaptic cell adhesion protein critical for synapse formation and function. Mutations in neurexin and neurexin-interacting proteins have been implicated in several neurological diseases. Previous studies have described Drosophila neurexin mutant phenotypes in third instar larvae and adults. However, the expression and function of Drosophila neurexin early in synapse development, when neurexin function is thought to be most important, has not been described.