这个词是什么意思？
An enzyme that catalyzes the reaction between a purine nucleoside and orthophosphate to form a free purine plus ribose-5-phosphate. EC 2.4.2.1.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D011683 · MeSH 2026。
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