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Appl Environ Microbiol. 1989 January; 55(1): 259-260

Lasalocid-catalyzed proton conductance in Streptococcus bovis as affected by extracellular potassium.

W R Schwingel, D B Bates, S C Denham and D K Beede

Animal Science Department, University of Florida, Gainesville 32611.

ABSTRACT

The effect of extracellular potassium on lasalocid-catalyzed proton conductance in Streptococcus bovis 24 was measured by using the fluorescent probe 9-aminoacridine. Increasing external potassium concentration resulted in decreased proton flux into S. bovis cells exposed to the ionophore. These results suggest that lasalocid catalyzes K+/H+ exchange diffusion in S. bovis cells.

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Appl Environ Microbiol. 1989 January; 55(1): 259-260

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