Adenosine nucleosidase () is an enzyme that catalyzes the chemical reaction
The enzyme characterised from Brussels sprouts hydrolyses the nucleoside, adenosine, to adenine and D-ribose. The enzyme is found in many plants as it is involved in cytokinin biosynthesis.
This enzyme is a hydrolase, specifically a glycosylase that hydrolyses N-glycosyl compounds. The systematic name of this enzyme class is adenosine ribohydrolase. Other names in common use include adenosinase, N-ribosyladenine ribohydrolase, adenosine hydrolase, and ANase.
See also Purine nucleosidase, which is a more general enzyme that also has this activity
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