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Lasalocid-catalyzed proton conductance in Streptococcus bovis as affected by extracellular potassium
W R Schwingel1, D B Bates, S C Denham
1Animal Science Department, University of Florida, Gainesville 32611.
Applied and Environmental Microbiology
|January 1, 1989
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.