Purines, pyrimidines, nucleosides, and nucleotides:Pyrimidine ribonucleotide biosynthesis

Dihydroorotase (NCBI)
Carbamoyl-phosphate synthase large chain (NCBI)
Aspartate carbamoyltransferase, regulatory subunit (NCBI)
CTP synthase (NCBI)
Orotidine-5'-phosphate decarboxylase (NCBI)
Orotate phosphoribosyltransferase (NCBI)
Aspartate carbamoyltransferase; catalytic subunit (NCBI)
Carbamoyl-phosphate synthase small chain (NCBI)