guanine

(gwä′nēn′, -nin)

noun

a crystalline purine base, CHNO, contained in the nucleic acids of all tissue: it links with cytosine in the DNA structure

Origin: < guano (a commercial source of the base) + -ine

See guanine in American Heritage Dictionary 4

noun Abbr. G

A purine base, C₅H₅ON₅, that is an essential constituent of both RNA and DNA.

Origin:

Origin: From guano, in which it is found

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