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phosphoribosylformimino-5-aminoimidazole carboxamide ribotide isomerase, eukaryotic type This enzyme acts in the biosynthesis of histidine and has been characterized in S. cerevisiae and Arabidopsis where it complements the E. coli HisA gene. In eukaryotes the gene is known as HIS6. In bacteria, this gene is found in Fibrobacter succinogenes, presumably due to lateral gene transfer from plants in the rumen gut. [Amino acid biosynthesis, Histidine family]
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