Medical Dictionary

proton pump


Medical Definition of proton pump

  1. :  a molecular mechanism that transports hydrogen ions across cell membranes The physiological essence of the proton pump is to exchange extracellular K+ for intracellular H+.—John E. Hoover, Remington: The Science and Practice of Pharmacy, 21st edition, 2005 Chemical gradients have been used to create asymmetry in the environment, as in the case of proton pumps to couple chemical energy with molecular motion.—Jay Siegel, Science, 7 Oct. 2005—called also acid pump

Seen and Heard

What made you want to look up proton pump? Please tell us where you read or heard it (including the quote, if possible).


to cast off or become cast off

Get Word of the Day daily email!