| 释义 |
protonmotive, a. Physics and Biochem.|ˌprəʊtɒnˈməʊtɪv|
Also proton motive.
[f. proton + motive a.]
Of, pertaining to, or characterized by the movement of protons in response to an electric potential gradient; protonmotive force: a force analogous to the electromotive force, which acts on the proton gradient across cell membranes and comprises the sum of the electric potential difference and the pH gradient across the membrane.
1966P. Mitchell in Biol. Rev. XLI. 494 The operation of the proton-translocating ATPase and o/r chain systems in an ion-tight membrane would create both a pH differential and a membrane potential, conveniently described together as a protonmotive force..by analogy with electromotive force. 1977Hall & Baker Cell Membranes & Ion Transport iv. 79 The energy derived from the proton gradient (the proton motive force) may be used to drive oxidative phosphorylation. 1978Nature 7 Sept. 14/3 Bonner suggested that a modified protonmotive ubiquinone cycle satisfies the kinetics of cytochrome interactions. 1979Science 7 Dec. 1153/3 The first protonmotive device conceived by man was the electromotive hydrogen-burning fuel cell, invented by William Grove in 1839. 1980Federation Proc. XXXIX. 1706/1 According to Mitchell's chemiosmotic hypothesis, a protonmotive force..energizes the synthesis of ATP by a proton-translocating ATPase. |
