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Molecular history of the HIV whirlwind
Posted on October 02, 2008
Scientists have been using genetic data to estimate when species first appeared for some time. The basic idea is to use differences between species and a guess as to how fast sequences change as a molecular clock, running it backward until they show the same sequence. The same trick can be done with viral genetic information. If you know the genetic sequence of a virus at one point in time and then at a later time you can make an estimate of how fast the clock is ticking. An analysis along these lines has just been done with a newly found lymph node sample from Kinshasa (Democratic Republic of...
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