Lasalocid-catalyzed proton conductance in Streptococcus bovis as affected by extracellular potassium.
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.
Schwingel
W R
WR
Animal Science Department, University of Florida, Gainesville 32611.
Bates
D B
DB
Denham
S C
SC
Beede
D K
DK
D000609:Aminoacridines; D001692:Biological Transport / Q000187:drug effects; D005470:Fluorometry; D007832:Lasalocid / Q000494:pharmacology*; D011188:Potassium / Q000494:pharmacology*; D013291:Streptococcus / Q000187:drug effects / Q000378:metabolism*
D000609:Aminoacridines; D011188:Potassium; D007832:Lasalocid