Definition of pyrimidine in English:

pyrimidine

noun pɪˈrɪmɪdiːn

mass nounChemistry

1A colourless crystalline compound with basic properties.
〔化〕嘧啶，间二氮（杂）苯
A heteroaromatic compound; chemical formula: C₄H₄N₂
Example sentencesExamples
- Second, there is no branch in the pyrimidine synthesis pathway.
- The purine and pyrimidine bases in cells are linked to carbohydrate and in this form are termed, nucleosides.
- The URA3 gene is essential for yeast pyrimidine biosynthesis.
- The transcription of the operon is coordinately repressed in the presence of excess pyrimidine nucleotides.
- Our analyses also suggest that the utilization of products of de novo pyrimidine biosynthesis may differ between different cell types.
1. 1.1count noun A substituted derivative of pyrimidine, especially the bases thymine and cytosine present in DNA.
  嘧啶碱基
  Example sentencesExamples
  Purines and pyrimidines are considered as complex molecules themselves because they are never synthesized as such in vivo.
  Both purine and pyrimidine bases present similar PI yields at 266 nm.
  Both of these products involve dimerization of adjacent pyrimidines on the same DNA strand.
  Some introns also have a sequence rich in pyrimidines that adds up to 10 additional bases at the 3’ end.

Origin

Late 19th century: from German Pyrimidin, from pyridine, with the insertion of -im- from imide.

Definition of pyrimidine in US English:

pyrimidine

noun

Chemistry

1A colorless crystalline compound with basic properties.
〔化〕嘧啶，间二氮（杂）苯
A heteroaromatic compound; chemical formula: C₄H₄N₂
Example sentencesExamples
- The URA3 gene is essential for yeast pyrimidine biosynthesis.
- The transcription of the operon is coordinately repressed in the presence of excess pyrimidine nucleotides.
- Our analyses also suggest that the utilization of products of de novo pyrimidine biosynthesis may differ between different cell types.
- Second, there is no branch in the pyrimidine synthesis pathway.
- The purine and pyrimidine bases in cells are linked to carbohydrate and in this form are termed, nucleosides.
1. 1.1 A substituted derivative of pyrimidine, especially the bases thymine and cytosine present in DNA.
  嘧啶碱基
  Example sentencesExamples
  Some introns also have a sequence rich in pyrimidines that adds up to 10 additional bases at the 3’ end.
  Both of these products involve dimerization of adjacent pyrimidines on the same DNA strand.
  Purines and pyrimidines are considered as complex molecules themselves because they are never synthesized as such in vivo.
  Both purine and pyrimidine bases present similar PI yields at 266 nm.

Origin

Late 19th century: from German Pyrimidin, from pyridine, with the insertion of -im- from imide.

词汇	pyrimidine
释义	Definition of pyrimidine in English: pyrimidine noun pɪˈrɪmɪdiːn mass nounChemistry 1A colourless crystalline compound with basic properties. 〔化〕嘧啶，间二氮（杂）苯 A heteroaromatic compound; chemical formula: C₄H₄N₂ Example sentencesExamples Second, there is no branch in the pyrimidine synthesis pathway. The purine and pyrimidine bases in cells are linked to carbohydrate and in this form are termed, nucleosides. The URA3 gene is essential for yeast pyrimidine biosynthesis. The transcription of the operon is coordinately repressed in the presence of excess pyrimidine nucleotides. Our analyses also suggest that the utilization of products of de novo pyrimidine biosynthesis may differ between different cell types. 1.1count noun A substituted derivative of pyrimidine, especially the bases thymine and cytosine present in DNA. 嘧啶碱基 Example sentencesExamples Purines and pyrimidines are considered as complex molecules themselves because they are never synthesized as such in vivo. Both purine and pyrimidine bases present similar PI yields at 266 nm. Both of these products involve dimerization of adjacent pyrimidines on the same DNA strand. Some introns also have a sequence rich in pyrimidines that adds up to 10 additional bases at the 3’ end. Origin Late 19th century: from German Pyrimidin, from pyridine, with the insertion of -im- from imide. Definition of pyrimidine in US English: pyrimidine noun Chemistry 1A colorless crystalline compound with basic properties. 〔化〕嘧啶，间二氮（杂）苯 A heteroaromatic compound; chemical formula: C₄H₄N₂ Example sentencesExamples The URA3 gene is essential for yeast pyrimidine biosynthesis. The transcription of the operon is coordinately repressed in the presence of excess pyrimidine nucleotides. Our analyses also suggest that the utilization of products of de novo pyrimidine biosynthesis may differ between different cell types. Second, there is no branch in the pyrimidine synthesis pathway. The purine and pyrimidine bases in cells are linked to carbohydrate and in this form are termed, nucleosides. 1.1 A substituted derivative of pyrimidine, especially the bases thymine and cytosine present in DNA. 嘧啶碱基 Example sentencesExamples Some introns also have a sequence rich in pyrimidines that adds up to 10 additional bases at the 3’ end. Both of these products involve dimerization of adjacent pyrimidines on the same DNA strand. Purines and pyrimidines are considered as complex molecules themselves because they are never synthesized as such in vivo. Both purine and pyrimidine bases present similar PI yields at 266 nm. Origin Late 19th century: from German Pyrimidin, from pyridine, with the insertion of -im- from imide.
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