cytosine
noun
cy·to·sine
| \ ˈsī-tə-ˌsēn
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Definition of cytosine
Examples of cytosine in a Sentence
Recent Examples on the Web
Part of this gene contains repeated segments for three of the letters of the DNA code—cytosine, adenine and guanine, which are known as CAG repeats. — Bret Stetka, Scientific American, "Antisense Drugs for Huntington’s, ALS and Prion Diseases Could Meet the Dire Need for Brain Treatments," 15 Aug. 2019 Her team reported last year in Cell that many mRNA cytosine bases are acetylated. — Ken Garber, Science | AAAS, "Hidden layer of gene control influences everything from cancer to memory," 1 July 2019 In a process called hydrolytic deamination, for example, the base cytosine spontaneously loses its amino group and becomes uracil. — Quanta Magazine, "Ancient DNA Yields Snapshots of Vanished Ecosystems," 29 May 2019 In 1953, scientists proposed that DNA is structured as a double helix, with the chemical bases—adenine (A), cytosine (C), guanine (G), and thymine (T)—stacked up in pairs between two intertwining lengths of sugar and phosphate. — Ryan Rossotto, National Geographic, "DNA, explained," 12 June 2019 For instance, with height, having a guanine base instead of a cytosine one in a particular DNA region might correlate with being 0.1 millimeter taller than average. — Quanta Magazine, "New Turmoil Over Predicting the Effects of Genes," 23 Apr. 2019 To form the i-motif, the double helix untwists and then one of the strands bunches up with a bunch of cytosine molecules. — Avery Thompson, Popular Mechanics, "Scientists Discover That the Double Helix Isn't the Only DNA Form," 24 Apr. 2018 Tobacco Doctors already knew that tobacco could cause cancer, but Alexandrov’s work showed how—by preferentially mutating certain bases (such as cytosine) into others (adenine). — Jacqueline Detwiler, Popular Mechanics, "One Guy With a Supercomputer Who's Chasing the Causes of Cancer," 19 Mar. 2018 The bases are often referred to as A, C, G and T, the initials of their full chemical names, adenine, cytosine, guanine and thymine. — The Economist, "BiotechnologyGene editing takes another step forward," 26 Oct. 2017These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cytosine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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