这个词是什么意思？
A DNA-dependent RNA polymerase present in bacterial, plant, and animal cells. The enzyme functions in the nucleolar structure and transcribes DNA into RNA. It has different requirements for cations and salts than RNA polymerase II and III and is not inhibited by alpha-amanitin.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D012318 · MeSH 2026。
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