Uridine nucleosidase

Nucleoside phosphorylase activity is widely distributed, having been reported in yeast, E. coli, L. casei, and other sources. A nucleosidase specific for uridine has been purified several hundredfold from E. coli, using sonic vibration, ammonium sulfate, and gel steps.It does not attack cytidine or the purine nucleosides. 

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