Anti-HIV gene goes back millennia

日期:2019-03-02 08:12:01 作者:吉堇 阅读:

A RARE genetic mutation that gives a few fortunate people resistance to HIV infection is thousands of years old – meaning it was probably not handed down from ancestors who survived bubonic plague. Earlier studies estimated that the mutation, which occurs on the CCR5 gene, was 700 years old, leading to the idea that a positive evolutionary force during the Middle Ages, such as resistance to plague, could have encouraged it to survive. The age of a mutation is typically determined by how many variations of it exist,