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The sulphonylurea receptor SUR1 model. Expanded view of (A) site 1 and (B) site 2 of the sulphonylurea receptor SUR1 model. Nucleotide-binding domains (NBDs) 1 and 2 are shown in yellow and purple, respectively. The ATP molecule is shown in green and Mg2+ in brown. Residues that lie within 4 Å of the nucleotide are shown in ball-and-stick configuration.
