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Structural comparison of FliY to CheX and CheZ. Comparison of the active center residues of FliY (site 1 in pink, site 2 in orange) and B. burgdorferi CheX (cyan) in complex with CheY·BeF3−·Mg2+ (bule) (A) and E. coli CheZ (light blue) in complex with CheY·BeF3−·Mg2+ (B).
