Rfpl4b,全称为RNA Polymerase I and III Subunit RPC4B,是一种编码RNA聚合酶I和III的亚基的基因。RNA聚合酶I和III是负责转录核糖体RNA(rRNA)和小RNA(如tRNA和5S rRNA)的关键酶。这些RNA分子在蛋白质合成中发挥重要作用,因此Rfpl4b对于维持正常的细胞功能和生长至关重要。
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