该研究通过混合结构和序列进化追踪方法，揭示了 RNA 靶向的 crispr-cas13 系统可能起源于一种古老的 RNA 毒素-抗毒素（TA）系统，特别是 AbiF 系统。 该 ...

They discovered that during the transition to the VBNC state, the bacterium loses its initial rod shape and becomes round.