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- W1991220713 abstract "Abstract The increase in negative surface charge density resulting from binding of the anionic dye bromosulfophthalein to mitochondrial membranes affects the movement of a variety of ions, depending on the dye concentration. At low concentrations, a sort of membrane-stabilization with decreased permeabilities is observed, whereas at high concentrations, a detergent like action occurs. (1). Acidification on respiration of mitochondrial suspensions is increased by very small concentrations (= 3 nmol/mg protein) of bromosulfophthalein. It reflects an increased transmembranal pH gradient. The effect is mainly due to inhibition of phosphate translocation. (2), Mitochondrial swelling experiments under specific conditions showed that transport of inorganic phosphate is inhibited in either direction. (3). Concentrations of > 10 nmol bromosulfophthalein/mg protein result in a membrane-destabilization. This is reflected in a release of Ca 2+ ions and a subsequent increase in membrane permeability for succinate and inorganic phosphate. (4). All effects of bromosulfophthalein are freely reversible by the addition of albumin, to which the dye is bound with high affinity. (5). Similar effects can be observed with other compounds which are similar in structure, although none of those tried is effective in such small concentrations." @default.
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- W1991220713 date "1977-05-01" @default.
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- W1991220713 title "Interaction of bromosulfophthalein with mitochondrial membranes: Effect on ion movements" @default.
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- W1991220713 doi "https://doi.org/10.1016/0006-2952(77)90394-x" @default.
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