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An immune system so versatile it might kill you

发布时间:2019-02-28 04:10:08来源:未知点击:

HERE’S a hypothetical question. Would you rather have a low risk of cancer or a flexible immune system? It’s hypothetical because evolution has already plumped for the second option. What we have is an adaptive immune system that can “learn” to attack specific pathogens – but we now know there is a price to pay. To boost their ability to identify and attack invading microbes white blood cells have transposons or “jumping genes” that relocate themselves along chromosomes so that the cell can frequently rearrange its DNA. The problem is that transposons can reinsert themselves at random places in a chromosome,