A complex genetic locus that controls of the first three steps of pyrimidine biosynthesis in Drosophila.
D000581:Amidohydrolases / Q000096:biosynthesis; D000818:Animals; D001221:Aspartate Carbamoyltransferase / Q000096:biosynthesis; D002223:Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing) / Q000096:biosynthesis; D002874:Chromosome Mapping; D004331:Drosophila melanogaster / Q000378:metabolism*; D005796:Genes; D005816:Genetic Complementation Test; D008040:Genetic Linkage; D009963:Orotic Acid; D011743:Pyrimidines / Q000096:biosynthesis*
D011743:Pyrimidines; D009963:Orotic Acid; D001221:Aspartate Carbamoyltransferase; D000581:Amidohydrolases; D002223:Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)