: 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 WebThe 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 Four chemical bases — adenine, guanine, cytosine, and thymine — bond with hydrogen to make base pairings.—Emilie Le Beau Lucchesi, Discover Magazine, 15 Apr. 2022 Adenine bonds with thymine, and cytosine bonds with guanine.—Olivia Munson, USA TODAY, 14 Feb. 2023 Huntington’s disease is caused by over-amplification of nucleotide repeat sequence CAG (cytosine-adenine-guanine) in the the gene huntingtin, causing the pathology.—Charlotte Hu, Discover Magazine, 13 Feb. 2018 Rather than inducing random changes in the virus’ RNA genome, the drug is more likely to cause specific nucleic acid substitutions, with guanine switching to adenine and cytosine to uracil.—Byrobert F. Service, science.org, 1 Feb. 2023 See More
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
Share