Figure 6.
Figure 6. Voltage dependence of K1/2,K. Apparent K+ affinity was determined as shown in Fig. 5 C. Ip was measured in four fibers for five extracellular K+ concentrations (2, 4, 10, 20, and 40 mM) and five holding potentials, and fit to the Hill equation to obtain K1/2,K values for each holding potential. The Hill coefficient was constrained to 1.68. Different symbols represent different fibers. Temperature, 22°C.

Voltage dependence of K1/2,K. Apparent K+ affinity was determined as shown in Fig. 5 C. Ip was measured in four fibers for five extracellular K+ concentrations (2, 4, 10, 20, and 40 mM) and five holding potentials, and fit to the Hill equation to obtain K1/2,K values for each holding potential. The Hill coefficient was constrained to 1.68. Different symbols represent different fibers. Temperature, 22°C.

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