purine

American  

[pyoor-een, -in] / ˈpyʊər in, -ɪn /

noun

Chemistry, Biochemistry.

1. a white, crystalline compound, C 5 H 4 N 4 , from which is derived a group of compounds including uric acid, xanthine, and caffeine.

2. one of several purine derivatives, especially the bases adenine and guanine, which are fundamental constituents of nucleic acids.

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purine British  

/ ˈpjʊəriːn, ˈpjʊərɪn /

noun

1. a colourless crystalline solid that can be prepared from uric acid. Formula: C 5 H 4 N 4

2. Also called: purine base.  any of a number of nitrogenous bases, such as guanine and adenine, that are derivatives of purine and constituents of nucleic acids and certain coenzymes

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purine Scientific  

/ pyr′ēn′ /

1. Any of a group of organic compounds containing two fused rings of carbon and nitrogen atoms. One ring has six members, the other has five, and each has two nitrogens. Purines include a number of biologically important compounds, such as adenosine, caffeine, uric acid, and the two bases adenine and guanine, which are components of DNA and RNA.

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Etymology

Origin of purine

From the German word Purin, dating back to 1895–1900. See pure, uric, -ine ²

Example Sentences

Tea and chocolate also contain caffeine, which theobromine is related to as part of the purine family of chemicals.

From Salon • Mar. 28, 2024

However, with JHU395 treatment, the tumors can still access purine by a recycling or salvage pathway.

From Science Daily • Dec. 1, 2023

The drug works by impairing one arm of purine production, the "de novo" pathway.

From Science Daily • Dec. 1, 2023

Transversion substitution refers to a purine being replaced by a pyrimidine, or vice versa; for example, cytosine, a pyrimidine, is replaced by adenine, a purine.

From Textbooks • Jun. 9, 2022

The metal purine and pyrimidine models, needed for systematically checking all the conceivable hydrogen-bonding possibilities, had not been finished on time.

From "Double Helix" by James D. Watson