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NDP-hexose 2,3-dehydratase This family includes a range of proteins from antibiotic production pathways. The family includes gra-ORF27 product that probably functions at an early step, most likely as a dTDP-4-keto-6- deoxyglucose-2,3-dehydratase. Its homologs include dnmT from the daunorubicin biosynthetic gene cluster in S. peucetius, a similar gene from the daunomycin biosynthetic cluster in Streptomyces sp. strain C5, eryBVI from the erythromycin cluster in S. erythraea and snoH from the nogalamycin cluster in S. nogalater. The proteins in this family are composed of two copies of a 200 amino acid long unit that may be a structural domain.
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