Low potassium-type but not high potassium-type sheep red blood cells show passive K+ transport induced by low ionic strength.
Low potassium-type (LK) sheep red blood cells show a significant increase of the residual (i.e., ouabain-insensitive) K+ influx when the ionic strength of the solution is decreased. This effect is absent from high potassium-type (HK) sheep red blood cells. The KCl cotransport system is not involved since three different manoeuvres to suppress the KCl cotransport (replacement of Cl- by NO3-, volume-decrease, inhibition by anti-L1 antibodies) have no effect on the low ionic strength-stimulated K+ influx.
Erdmann
A
A
Department of Biophysics, Humboldt University, Berlin, G.D.R.
Bernhardt
I
I
Pittman
S J
SJ
Ellory
J C
JC
D000818:Animals; D001692:Biological Transport; D002352:Carrier Proteins / Q000097:blood; D002712:Chlorides / Q000097:blood; D004911:Erythrocyte Volume; D004912:Erythrocytes / Q000378:metabolism*; D009994:Osmolar Concentration; D010042:Ouabain / Q000494:pharmacology; D011188:Potassium / Q000097:blood*; D012756:Sheep; D027981:Symporters; D000096922:K Cl- Cotransporters
D002352:Carrier Proteins; D002712:Chlorides; D010042:Ouabain; D011188:Potassium; D027981:Symporters; D000096922:K Cl- Cotransporters