guanine

guanine

[gwah-neen]
noun Biochemistry.
a purine base, C 5 H 5 N 5 O, that is a fundamental constituent of DNA and RNA, in which it forms base pairs with cytosine. Symbol: G
Compare guanosine.


Origin:
guan(o) + -ine2

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World English Dictionary
guanine (ˈɡwɑːniːn, ˈɡuːəˌniːn)
 
n
a white almost insoluble compound: one of the purine bases in nucleic acids. Formula: C5H5N5O
 
[C19: from guano + -ine²]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

guanine gua·nine (gwä'nēn')
n.
Abbr. G
A purine base that is an essential constituent of both RNA and DNA.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
guanine   (gwä'nēn')  Pronunciation Key 
A purine base that is a component of DNA and RNA, forming a base pair with cytosine. It also occurs in guano, fish scales, sugar beets, and other natural materials. Chemical formula: C5H5ON5.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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