quinonoid造句

• Dihydrobiopterin reductase activity is needed to replenish quinonoid-dihydrobiopterin back into its tetrahydrobiopterin form, which is an important cofactor in many reactions in amino acid metabolism.
• The pterin cofactor is regenerated by hydration of the carbinolamine product of PAH to quinonoid dihydrobiopterin ( qBH 2 ), which is then reduced to BH 4.
• This mechanism is supported by mutations of Arg219 . Mutations changing Arg219 to a carboxylate result in a quinonoid intermediate being detected whereas none was detected with arginine.
• A substance that it secretes, 2, 3-dimethoxy-geranyl-1, 4-benzoquinone ( consisting of a quinonoid ring with a 10 or 11 carbon-membered side chain ) is a remarkably strong sensitizer, which is found nowhere else in the plant kingdom.