Figure 2: GltTk binds three sodium ions per aspartate molecule. | Nature Communications

Figure 2: GltTk binds three sodium ions per aspartate molecule.

From: Coupled binding mechanism of three sodium ions and aspartate in the glutamate transporter homologue GltTk

Figure 2

Apparent affinity of GltTk for aspartate as a function of Na+ concentration, as determined by isothermal titration calorimetry. In the limit of low sodium concentrations the negative slope of the plot approaches the Na+:aspartate binding stoichiometry9,10,26. The slope of the red line is −2.8. Error bars indicate standard deviations from at least 3 independent experiments.

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