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Crystal structures of AFCCA complexes with mini-D73N74C75. (A) Superposition of the four complexes. Complexes with mini-D73C74C75, mini-D73A74C75, mini-D73G74C75, and mini-D73U74C75 are coloured magenta, marine blue, green, and orange, respectively. All of the complexes adopted the open form. (B) Structures of the four catalytic regions of the complexes. The complexes with mini-D73C74C75, mini-D73A74C75, mini-D73G74C75, and mini-D73U74C75 are coloured as in (A).
