pyrimidine base

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Related to pyrimidine base: purine base

py·rim·i·dine base

a pyrimidine.
References in periodicals archive ?
Surprisingly, the analysis of 5,6-dihydrouridine in urine with the chromatographic and MS conditions as described for the pyrimidine bases and their degradation products showed that the presence of this compound interferes with the detection of 5,6-dihydrouracil.
Patients with a DHP deficiency accumulate DHT and DHU and exhibit slightly increased concentrations of the pyrimidine bases.
14]C]Thymine was catabolized by human liver to radiolabeled dihydrothymine, N-carbamyl-[beta]-aminoisobutyric acid, and [beta]-aminoisobutyric acid, showing the presence of all three active enzymes--DPD, dihydropyrimidinase, and [beta]-ureidopropionase--of the catabolic pathway of the pyrimidine bases.
Separation of purine and pyrimidine bases and of nucleotides by anion exchange.
Dihydropyrimidine dehydrogenase is the initial enzymatic step in the degradative pathway of the pyrimidine bases uracil and thymine (Fig.