Energizing protons in membranes
نویسندگان
چکیده
منابع مشابه
Transport Electrons and Protons Across Membranes
Surface-active properties of ubiquinones and ubiquinols have been investigated by monomolecular-film techniques. Stable monolayers are formed at an air/water interface by the fully oxidized and reduced forms of the coenzyme; collapse pressures and hence stability of the films tend to increase with decreasing length of the isoprenoid side chain and films of the reduced coenzymes are more stable ...
متن کاملEnergizing the Mind and Body
Insulin can get a bum rap. Although a mainstay of diabetes treatment, when secretion increases in response to a low-fat, high-carbohydrate diet or insulin resistance, insulin has been purported to raise blood pressure, potentiate cardiovascular risk, and, to make matters worse, promote weight gain (1,2). But many in the lay public, popular media, and health care are not aware (or choose not to ...
متن کاملAnomalous surface diffusion of protons on lipid membranes.
The cellular energy machinery depends on the presence and properties of protons at or in the vicinity of lipid membranes. To asses the energetics and mobility of a proton near a membrane, we simulated an excess proton near a solvated DMPC bilayer at 323 K, using a recently developed method to include the Grotthuss proton shuttling mechanism in classical molecular dynamics simulations. We obtain...
متن کاملRole of Leaflet Asymmetry in the Permeability of Model Biological Membranes to Protons, Solutes, and Gases
Bilayer asymmetry in the apical membrane may be important to the barrier function exhibited by epithelia in the stomach, kidney, and bladder. Previously, we showed that reduced fluidity of a single bilayer leaflet reduced water permeability of the bilayer, and in this study we examine the effect of bilayer asymmetry on permeation of nonelectrolytes, gases, and protons. Bilayer asymmetry was ind...
متن کاملNumber of Protons/Bi-stable Catalysts and Membranes in P Systems. Time-Freeness
Proton pumping P systems are a variant of membrane systems with both rewriting rules and symport/antiport rules, where a set of objects called protons is distinguished, every cooperative symport or antiport rule involves a proton, but no rewriting rule does. Time-freeness property means the result of all computations does not depend on the time it takes to execute the rules. The goal of this ar...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/338709a0