Before revision:  For Escherichia coli, the run time distribution was reported to follow a Poisson process with a single characteristic time related to the rotational switching of the flagellar motor. Direct measurements on flagellar motors show , on the contrary, heavy-tailed distributions of rotation times stemming from the intrinsic noise in the chemotactic mechanism.
After revision:  For Escherichia coli, the run time distribution was reported to follow a Poisson process with a single characteristic time related to the rotational switching of the flagellar motors. However, direct measurements on flagellar motors show , on the contrary, heavy-tailed distributions of rotation times stemming from the intrinsic noise in the chemotactic mechanism.