Anionic mechanisms of zinc uptake across the human red cell membrane.
Anionic mechanisms of zinc uptake across the human red cell membrane.
复制标题
穿过人类红细胞膜的锌摄取的阴离子机制。
DOI:
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复制
发表时间:
1990
期刊:
影响因子:
--
通讯作者:
T. Simons
中科院分区:
文献类型:
--
作者:
V. Kalfakakou;T. Simons
1. Zinc is taken up into human red cells by two mechanisms that depend upon the presence of anions. One of these requires bicarbonate ions, is inhibited by 4,4'‐diisothiocyanatostilbene‐2,2'‐disulphonic acid (DIDS) and appears to be catalysed by the anion exchanger. The second occurs in the presence of thiocyanate or salicylate ions and may represent transport of a neutral complex with Zn2+. 2. The initial rate of Zn2+ uptake via the anion exchanger is 64 +/‐ 13 mumol (10(13) cells x h)‐1 microM‐1 external Zn2+, in the presence of 5 mM‐bicarbonate at pH 7.4 and 37 degrees C (+/‐ S.D.). This is about 1/250 of the corresponding rate of Pb2+ uptake by the anion exchanger. 3. The variation of transport with Zn2+ concentration, HCO3‐ concentration and pH suggests that the transported species may be ZnCO3Cl‐ or Zn(HCO3)Cl.OH‐. 4. Zinc efflux could not be observed by either of the above routes. This observation suggests that the intracellular free Zn2+ concentration is below 3 nM.
DOI:
10.1016/0005-2736(81)90099-7
发表时间:
1981
期刊:
Biochimica et biophysica acta
影响因子:
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作者:
Stacey,NH;Klaassen,CD
通讯作者:
Klaassen,CD
DOI:
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发表时间:
1986
期刊:
Federation proceedings
影响因子:
--
作者:
Pattison,SE;Cousins,RJ
通讯作者:
Cousins,RJ
DOI:
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发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
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作者:
Labotka,RJ;Omachi,A
通讯作者:
Omachi,A