Issue Date: June 6, 2011
New Base On The Block
Like most folks with a basic knowledge of genetics, you probably believe that life’s blueprint is based on just five components. Namely, DNA’s four bases—adenine, cytosine, guanine, and thymine—and the periodically methylated cytosine bases that help silence genes so that a heart cell doesn’t produce toenails and puberty doesn’t hit a toddler.
It turns out that you, along with a battery of geneticists, biochemists, and textbook writers, may have missed an important genetic base. As . . .
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