Nucleotide effects on glucan-synthesis activities of particulate enzymes from Saprolegnia

Membrane-bound β-1-3- and β-1-4-glucan synthetases of Saprolegnia are affected in vitro by the presence of nucleotides. Both enzymatic activities are inhibited by uridine nucleotides. Guanosine 5′-triphosphate and ATP reduce β-1-3-glucan synthesis but stimulate β-1-4-glucan production; they also inc...

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