: a purine base C5H5N5O that codes genetic information in the polynucleotide chain of DNA or RNA compare adenine, cytosine, thymine, uracil
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Future medical devices To map this phenomenon, the team manipulated the guanine crystals using electromagnets to shift their positions while exposing them to an external light source.—Mrigakshi Dixit, Interesting Engineering, 26 May 2026 The bases are split into two categories: purines (adenine and guanine) and pyrimidines (thymine, cytosine and uracil).—Devika Rao, TheWeek, 24 Mar. 2026 Scientists have discovered that a sample of the Ryugu asteroid collected by Japan's Hayabusa 2 spacecraft contains the nucleobases adenine, guanine, cytosine, thymine and uracil, the building blocks of DNA and RNA upon which all life is based.—Robert Lea, Space.com, 17 Mar. 2026 Temozolomide—the standard of care for glioblastoma—works by depositing a methyl group onto the DNA of cells, specifically on guanine, one of DNA’s four base molecules.—Isabella Backman, Hartford Courant, 27 Jan. 2026 See All Example Sentences for guanine
Word History
Etymology
guano + -ine; from its being found especially in guano