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在细胞生物学中，前体细胞（英语：precursor cell）也被称为母细胞（blast cell），是指已经部分分化而失去大部分干细胞特性的细胞，其分化潜能仅为单能性，较祖细胞更少。前体细胞可视为从干细胞分化到具体细胞的最后一步[1]。
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