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Multiple alignment of the six CheY proteins from R. sphaeroides and CheY from S. enterica serovar Typhimurium. Sequence alignment was performed by using PILEUP (GCG-Wisconsin Package, version 9.1). Secondary structure prediction was carried out by using the program PSIPRED (8, 14). Identical residues are shaded in tones of black. Asterisks indicate relevant residues for the function of CheYSt.
