Inhibition of anion transport in human red blood cells by 5,5′-dithiobis(2-nitrobenzoic acid)

作者: Reinhart A.F. Reithmeier

DOI: 10.1016/0005-2736(83)90194-3

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摘要: The uptake of [32P]phosphate into human red blood cells was inhibited (Ki = 0.6 mM) by the sulfhydryl reagent 5,5'-dithiobis(2-nitrobenzoic acid) (DTNB). 2-Nitro-5-thiobenzoic acid (NTB), reduced form DTNB, a less potent inhibitor 7 mM). inhibition anion transport DTNB could be reversed washing DTNB-treated with isotonic buffer, or incubating 2-mercaptoethanol, which converted to NTB. competitively binding 4-[14C]-benzamido-4'-aminostilbene-2,2'-disulfonate, 1-2 microM), band 3 protein in and ghost membranes. These results suggest that stilbene-disulfonate site can readily accommodate organic not due reaction an essential group.

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