GO:0006207

'de novo' pyrimidine nucleobase biosynthetic process

Details: 
The chemical reactions and pathways resulting in the formation of pyrimidine nucleobases, 1,3-diazine, organic nitrogenous bases, beginning with the synthesis of a pyrimidine ring from simpler precursors. [GOC:mah, ISBN:0716720094]
Evidence Code: 
IEA