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The crystal structure of the GroE chaperonin from Escherichia coli in the open, ATP-bound (PDBID: 1KP8) and closed (PDBID: 1AON) states. The full complex and single subunits are depicted in panels A and B respectively. Helices I and H as well as the nucleotide binding pocket are indicated in B. Structures were rendered in PyMOL.
