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In polyoxin-resistant strains of Alternaria kikuchiana, the synthesis of cell-wall chitin was scarcely inhibited by polyoxin B, although chitin synthetase preparations of them showed a level of polyoxin sensitivity similar to those of sensitive strains. A decrease of14C-labelled polyoxin uptake was correlated with an increased level of polyoxin resistance(More)
The enzyme, l-glutamine d-fructose 6-phosphate amidotransferase (EC of Neurospora crassa, which catalyzes the formation of glucosamine 6-phosphate was shown to be subject to feedback inhibition by uridine diphosphate N-acetyl-d-glucosamine (UDP-GlcNAc). The conclusion is based on the following observations. UDP-GlcNAc, the direct precursor of(More)
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