Abstract
The typical mammalian genome contains 3 × lo9bp of DNA. This amount of DNA is believed to include 3-4 × lo4 unique protein- encoding genes. Even complex, highly specialized cells, such as neurons, express a small fraction, perhaps 20%, of all the possible genes, how- ever. A major problem in neurobiology, therefore, is to characterize the mechanisms involved in neural-specific gene expression. Significant progress has been made in our understanding of the factors that restrict the expression of genes to particular cell lineages. A particularly good example is the growth hormone (GH) gene. Growth hormone belongs to a gene family that includes prolactin and chorionic somatomammotropin. Despite a high degree of homology between these genes derived from a single common ancestral gene, GH is exclusively expressed in one cell type in the mammal, the pitu- itary somatotroph. The first step in defining the molecular basis of somatotroph-specific gene expression was the identification of the minimal nucleotide sequences within the GH gene that confer strict pituitary-specific expression. Utilizing pituitaryderived cell lines trans- fected with reporter genes that contained putative cell-specific human or rat GH gene regulatory sequences, several groups of investigators delineated two binding sites in the promoter region that are essential
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© 1992 The Humana Press, Totowa, NJ
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Low, M.J. (1992). The Identification of Neuropeptide Gene Regulatory Elements in Transgenic Mice. In: Longstaff, A., Revest, P. (eds) Protocols in Molecular Neurobiology. Methods in Molecular Biology™, vol 13. Springer, Totowa, NJ. https://doi.org/10.1385/0-89603-199-3:181
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DOI: https://doi.org/10.1385/0-89603-199-3:181
Publisher Name: Springer, Totowa, NJ
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