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Fig. 9. Effects of variation in saline ion composition on K+ flux. (A)
Effects of changes in Na+ concentration and K+
concentration on K+ flux (mean ±
S.E.M.). The key indicates saline
K+ concentration in mmol l–1. (B)
Double-reciprocal plots of K+ flux vs bathing saline
K+ concentration for salines containing the three Na+
concentrations (in mmol l–1) indicated in the key. Data fit
three straight lines described by the function y=0.62x+0.066
for tubules in 137.1 mmol l–1 Na+,
y=0.47x+0.071 for tubules bathed in 120 mmol
l–1 Na+ and y=0.395x+0.068 for
tubules bathed in 98 mmol l–1 Na+.
N=8–10 tubules.
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