Homeobox Genes in the Developing Mouse Brain

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Abstract
Any list of past and recent findings on vertebrate brain prenatal development would have to include the fundamental roles of homeobox genes, the genes encoding the nuclear regulatory homeodomain proteins. The discovery of homeobox genes and their involvement as master regulatory elements in programing the development of an embryo into a complete adult organism has provided a key to our understanding of ontogenesis. Also, the correlation of mouse developmental mutants and their corresponding human syndromes with mutations in homeobox genes has provided further evidence for the fundamental role of homeobox genes during the vertebrate brain embryonic development. Here, we review the expression patterns and the phenotypes of gene mutations that implicate a large repertoire of mouse homeobox genes in the specification of neuronal functions during brain embryogenesis.

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