Cloning and analysis of a new developmentally regulated member of the basic helix-loop-helix family.
[No authors listed]
摘要
We have isolated a basic helix-loop-helix (bHLH) family member from an embryonic chick-brain cDNA library. This 3.86-Kb cDNA, GbHLH1.4, exhibits extensive sequence similarity in the bHLH domain with Drosophila daughterless and the vertebrate cDNAs E12 and HTF4. Outside of the bHLH region the similarity is significantly reduced. GbHLH1.4 recognizes a 4.0-Kb mRNA and in situ hybridization analysis shows that GbHLH1.4 mRNA is widely expressed at early stages of development but becomes progressively restricted as embryogenesis proceeds. At later stages of embryonic development, mRNA transcripts are localized to several structures including the ventricular layers of the spinal cord and brain, the facial primordia, dorsal root ganglia and heart muscle and cardiac valves. Strikingly, GbHLH1.4 expression in chick embryos exhibits significant overlap with that reported for the murine negative HLH regulator, Id.
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基因功能
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原始数据
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文献解读
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