a purine base, C5H5N5O, that is a fundamental constituent of DNA and RNA, in which it forms base pairs with cytosine. Symbol: G
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for guanine
Historical Examples of guanine
The artificial preparation of theobromine and caffeine from xanthine, and guanine also show clearly their relations.
He was afterwards named Biberoci Guahagiona, and the women gave him abundance of guanine and cibe to wear upon his arms.
Besides white (guanine) cells, the pigment includes black, brown, yellow and red.
The cutis contains several kinds of specialized cells in many layers, each filled with minute granules of guanine.
Adenine and guanine are constituents of all nucleic acids (see below) and, hence, are found in all plant and animal tissues.
British Dictionary definitions for guanine
a white almost insoluble compound: one of the purine bases in nucleic acids. Formula: C 5 H 5 N 5 O
Word Origin for guanine
C19: from guano + -ine ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for guanine
1850, from guano, from which the chemical first was isolated, + chemical suffix -ine (2).
Online Etymology Dictionary, © 2010 Douglas Harper
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.
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.