guanine

American  

[gwah-neen] / ˈgwɑ nin /

noun

Biochemistry.

1. 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. G

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guanine British  

/ ˈɡuːəˌniːn, ˈɡwɑːniːn /

noun

1. a white almost insoluble compound: one of the purine bases in nucleic acids. Formula: C 5 H 5 N 5 O

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guanine Scientific  

/ gwä′nēn′ /

1. 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: C ₅ H ₅ ON ₅ .

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Etymology

Origin of guanine

guan(o) + -ine ²

Example Sentences

Importantly they also discovered all five nitrogenous bases — adenine, guanine, cytosine, thymine, and uracil — that are necessary to build DNA and RNA.

From Salon • Jan. 30, 2025

These include 14 of the 20 amino acids that life on Earth uses to build proteins and all four of the ring-shaped molecules that make up DNA - adenine, guanine, cytosine and thymine.

From BBC • Jan. 29, 2025

Nucleotides are composed of three distinctive parts: a sugar molecule, a phosphate group and one of the four nucleobases adenine, thymine, guanine and cytosine.

From Science Daily • Mar. 8, 2024

It isn’t known to produce the other two, adenine and guanine, although Sasselov says there’s a “big push” to search for RAO reactions that could do it.

From Science Magazine • Jun. 13, 2023

Moreover, he felt sure that the quantum-mechanical arguments which showed why diketopiperazine has the keto form should also hold for guanine and thymine.

From "Double Helix" by James D. Watson