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单词 cytosine
释义

WordReference Random House Unabridged Dictionary of American English © 2024
cy•to•sine  (sītə sēn′, -zēn′, -sin),USA pronunciation n. [Biochem.]
  1. Biochemistrya pyrimidine base, C4H5N3O, that is one of the fundamental components of DNA and RNA, in which it forms a base pair with guanine. Symbol: C Cf. cytidine, cytidine monophosphate.
  • German Cytosin (1894); see cyto-, -ose2, -ine2

Collins Concise English Dictionary © HarperCollins Publishers::
cytosine /ˈsaɪtəsɪn/ n
  1. a white crystalline pyrimidine occurring in nucleic acids; 6-amino-2-hydroxy pyrimidine. Formula: C4H5N3O
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