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. Author manuscript; available in PMC: 2009 Feb 6.
Published in final edited form as: Biochemistry. 2008 Dec 30;47(52):13878–13886. doi: 10.1021/bi801745u

FIGURE 1.

FIGURE 1

Crystal structures of the MsbA homodimer from (A) E. coli in the open state and (B) S. typhimurium in the ADP/Vi-bound closed state (4). The NBD sites studied here are colored light blue and dark blue on opposite monomers, and the nucleotide is colored purple.