: a purine base C5H5N5O that codes genetic information in the polynucleotide chain of DNA or RNA compare adenine, cytosine, thymine, uracil
Examples of guanine in a Sentence
Recent Examples on the WebIn the double helix of DNA, the four types of bases in the opposing strands are paired, with guanine (G) bound to cytosine (C) and thymine (T) bound to adenine (A).—Dan Samorodnitsky, Quanta Magazine, 17 Jan. 2024 The molecule is made up of the chemical bases adenine, cytosine, guanine, and thymine—shortened to A, C, G, and T—which pair off to form a double helix.—Emily Mullin, WIRED, 4 Dec. 2023 This storage system works by converting digital information to the elements that make up DNA: adenine (A), cytosine (C), guanine (G), and thymine (T).—Emma Roth, The Verge, 4 Dec. 2023 Adenine pairs with thymine, and cytosine with guanine; a short strand made up, for example, of ATCG would bind to TAGC and not other sequences.—IEEE Spectrum, 26 Sep. 2023 The molecules are called bases and are represented by the letters A (adenine), T (thymine), G (guanine), and C (cytosine).—IEEE Spectrum, 22 Feb. 2016 Each floor, called a tetrad, has a guanine (G) base on all four corners.—Breanna Draxler, Discover Magazine, 27 Jan. 2014 Just four molecules make up all of our genes: Adenine (A), which can only pair with thymine (T), and cytosine (C), which can only pair with guanine (G).—Nathaniel Scharping, Discover Magazine, 9 Dec. 2020 The top layer of chameleon skin contains guanine crystals arranged in a lattice.—Christie Wilcox, Discover Magazine, 13 Mar. 2015
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'guanine.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
Etymology
guano + -ine; from its being found especially in guano
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