<i id='B3C584119C'><strike id='B3C584119C'><tt id='B3C584119C'><var date-time="a28819"></var><area dir="99b952"></area><map lang="4a1aa4"></map><pre date-time="703367" id='B3C584119C'></pre></tt></strike></i> 
A standard human genome has nearly three billion DNA letters in it. Photo: supplied
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