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当氢化酶的体内活性降低时,丙酮丁醇梭菌的跨膜pH值会反转(内部酸性更强)。

Transmembrane pH of Clostridium acetobutylicum is inverted (more acidic inside) when the in vivo activity of hydrogenase is decreased.

作者信息

Girbal L, Vasconcelos I, Soucaille P

机构信息

Centre de Ingénierie Gilbert Durand, Institut National des Sciences Appliquées, Toulouse, France.

出版信息

J Bacteriol. 1994 Oct;176(19):6146-7. doi: 10.1128/jb.176.19.6146-6147.1994.

Abstract

Evidence is reported here that alkalinization of Clostridium acetobutylicum cytoplasm involves hydrogenase activity. A decrease of in vivo hydrogenase activity is accompanied by intracellular accumulation of protons leading to a negative (interior acidic) pH gradient. However, the organism is able to maintain a constant proton motive force by interconverting chemical and electrical potentials.

摘要

本文报道的证据表明,丙酮丁醇梭菌细胞质的碱化涉及氢化酶活性。体内氢化酶活性的降低伴随着质子在细胞内的积累,导致负的(内部酸性)pH梯度。然而,该生物体能够通过化学势和电势的相互转换来维持恒定的质子动力。

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