приклади
The transcription of the operon is coordinately repressed in the presence of excess pyrimidine nucleotides.
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.
Both purine and pyrimidine bases present similar PI yields at 266 nm.
The URA3 gene is essential for yeast pyrimidine biosynthesis.
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