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Biophysical Journal 13: 167-178 (1973)
© 1973 the Biophysical Society

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Caloric Catastrophe

Lawrence Minkoff and Raymond Damadian

ABSTRACT

Six solutes known to be actively transported by bacteria were studied with the cell in a "minimum energy" state to determine if sufficient energy were available from cellular stores of ATP to supply the energy necessary to run postulated membrane-situated "pumps." Steady-state cellular concentrations of potassium, calcium, magnesium, leucine, glycine, and {alpha}-methyl glucoside were determined together with tracer fluxes, oxygen consumption, ATP turnover, and the P:O ratio. From these measurements, it was calculated that the energy supply, 4.20 cal/340 min-g dry wt, fell far short of the energy necessary (28.28 cal/340 min-g dry wt), by classical membrane theory, to operate "pumps."






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Copyright © 1973 by the Biophysical Society.