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GTP cyclohydrolase I (E.C. 3.5.4.16) is a homodecameric protein that catalyzes the conversion of GTP to 7,8- dihydroneopterin triphosphate (H(2)NTP), the initial step in the biosynthesis of pteridines. It was proposed that the enzyme complex could be composed of a dimer of two pentamers, or a pentamer of tightly associated dimers; then the active site of(More)
A P element enhancer trap screen was conducted to identify genes involved in dorsal-ventral boundary formation in Drosophila. The son of Notch (son) gene was identified by the son(2205) enhancer trap insertion, which is a partial loss-of-function mutation. Based on son(2205) mutant phenotypes and genetic interactions with Notch and wingless mutations, we(More)
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