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guanine [guanines]▼(substance obtained from guano)noun[UK: ˈɡwɑː.ˌnin] [US: ˈɡwɑː.ˌnin]DNA is composed of four nucleotides: adenine, thymine, cytosine and guanine. = El ADN se compone de cuatro nucleótidos: adenina, timina, citosina y guanina.
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