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The sodium and substrate binding sites in the occluded and inward-open structures taken from Shimamura et al. (2010 ▶). The carbon atoms of the amino acids have been coloured as in Fig. 4 ▶. The sodium ion is represented as a magenta sphere and the benzylhydantoin with cyan carbon atoms in the occluded structure. In the inward-open structure where these entities are not present they are represented in white.
