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Guanine
//ˈɡwɑː.niːn//
"Guanine" in a Sentence (2 examples)
DNA is composed of four nucleotides: adenine, thymine, cytosine and guanine.
Then he found them, the substances that made up the four-letter alphabet in whose language all life is written — adenine and cytosine, guanine and thymine.
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