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在大多数动物细胞中，存在着数以千计的桶状结构，它们是生物学最大的谜团之一。尽管研究人员尚未阐明这些“穹窿体”（vaults）的功能，但现在报告了这种令人费解的颗粒的一种新用途。研究团队对穹窿体进行了改造，使其能够收集RNA，并记录细胞群体在长达7 d内的几乎所有基因活动，为探究细胞的“过去”提供了前所未有的视角。

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（图片来源：《Science》）

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