Sodium Is Not Required for Chloride Efflux via Chloride/Bicarbonate Exchanger from Rat Thymic Lymphocytes

Table 2

Conditions of the experiments and model parameters estimated by fitting (2) and (4) to experimental data.

Parameter	Notation	Estimate
		Na^+-containing medium (solution 2)	Na^+-free medium (solution 3)
Initial chloride concentration in cytoplasm, mM	𝑦cytoplasm	22.6	21.0
Relative membrane permeability, s^−1	𝛼	0.000533	0.000774
A rate constant of the exchanger transition, s^−1	𝜆	0.000547	0.00547
Another rate constant of the exchanger transition, s^−1	𝜇	0.0169	0.0169
Exchanger efficacy, mM	𝐴	12.1	12.2