The sodium and aspartate symporter GltPh mediates transport by alternating between outward-facing and inward-facing states. These conformational changes are now probed using double electron-electron resonance (DEER) spectroscopy. The data show that GltPh samples both states with similar probabilities, and that each protomer in the GltPh homotrimer behaves independently of the others.
- Elka R Georgieva
- Peter P Borbat
- Olga Boudker