Figure 2.

Run-length histograms of wild-type and mutant kinesins. Run lengths were measured in a single molecule fluorescence motility assay as described in the Materials and Methods. The mean run length was determined by fitting to the cumulative probability distribution of the data (see Materials and Methods) and not to the histograms shown here. The mean run lengths and their associated errors are shown in Table . Three events longer than 10 μm were scored for H1Q, but are not shown.