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Figure 3.
FIGURE 3. Similarities of colicin M to other protein
structures. A, simulated annealed 2F[o] - F[c] map of the
N-terminal TonB-box domain. B, superposition of the N termini of
colicin M (white), FhuA (magenta; in complex with a TonB
fragment; PDB entry 2GRX), and BtuB (cyan; in complex with a
TonB fragment; PDB entry 2GSK). C, superposition of the
C-terminal domain of colicin M (gray) with the membrane-spanning
part of the outer membrane transporter Hia of H. influenzae
(red, blue, and green) (39).
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