the covalent thiol-reversible reaction of dtnb occurred on the exofacial carrier , since ( i ) penetration of dtnb into cells was minimal , ( ii ) blockade of potential uptake via the anion transporter did not affect dtnb-induced hexose transport inhibition , and ( iii ) dtnb protected from transport inhibition by the impermeant sulfhydryl reagent glutathione-maleimide-i .
C0003075
anion
C0021966
i