SUPPLEMENTARY MATERIALS SECTION

To test stability for sites found in GltPh and EAAT3 we have performed MD simulations on different ion loads. In the course of MD simulations it was found that only sites Na1, Na2, and Na3 are stable in the 3-ion binding simulations (Fig. S3), whereas ions are leaving readily and rapidly if placed into Na3’ or Na3’’ sites (instead of in ... ................
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