Cytosine, thymine, and uracil {pyrimidine, nucleic acid}| are single-ring nitrogenous bases synthesized from carbamoyl phosphate and aspartate, which make carbamylaspartate, which becomes dihydroorotate, which NAD+ oxidizes to orotic acid, making pyrimidine ring. Orotic-acid nitrogen binds to ribose-ring first carbon by pyrophosphate, to make uridylate. Uridylate transamination can make cytidylate.
Physical Sciences>Chemistry>Biochemistry>Nucleic Acid>Nucleotide
5-Chemistry-Biochemistry-Nucleic Acid-Nucleotide
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Date Modified: 2022.0224