Dictionary![]() ![]() gua•ninePronunciation: (gwä'nēn), [key] —n. Biochem. a purine base, C5H5N5O, that is a fundamental constituent of DNA and RNA, in which it forms base pairs with cytosine. Symbol: G Cf. guanosine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
|