trans-stimulation of efflux ( up to fourfold ) by a variety of the d-enantiomers of neutral hexoses , including glucose ( k 1/2=48 mum ) , 3-o-methyl-d-glucose ( k 1/2=139 mum ) , and fructose ( k 1/2=730 mum ) , but not by , for instance , d-allose , and l-sorbose , shows that carrier-substrate interaction critically involves the axial position at c-1 and c-3 , respectively .
C0019494
hexoses
C0016745
fructose