只需要多几次这类切除，就能达到带有单一环状线粒体祖先全部功能性基因的18条微型染色体。
It would take just a few more excision events to arrive at 18 mini chromosomes with all the functionality of their single-circle ancestor.
她们在1982年发表的此项结果相当令人震惊：CCCCAA序列似乎停止了微型染色体的降解。
The results, which they published in 1982, were astounding: the CCCCAA sequence appeared to stop the minichromosomes from degrading.
当这些微型染色体注入到酵母细胞中后，在细胞分裂时，这种CCCCAA的DNA序列在复制时对染色体起到了保护作用，就像鞋带末端的塑料帽对鞋带起到的防磨损作用。
When these were injected into yeast, the DNA sequence protected the chromosomes when they were copied, just as the plastic tips at the ends of shoelaces stop them from fraying.
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