De novo pyrimidine biosynthesis, glutamine (+ PRPP) => UMP
Brite
Enzymes [BR:mfoo01000]
1. Oxidoreductases
1.3 Acting on the CH-CH group of donors
1.3.5 With a quinone or related compound as acceptor
1.3.5.2 dihydroorotate dehydrogenase (quinone)
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