Motile Cells Rotate flagella to run or tumble Move toward or away from stimuli(taxis) Flagella proteins are H antigens (e.g.,E.coli O157:H7)• Rotate flagella to run or tumble • Move toward or away from stimuli (taxis) • Flagella proteins are H antigens (e.g., E. coli O157:H7) Motile Cells