Figure 4.

Fits to swim ring expansion as a function of time for the three classes of mutants, according to Eq. 15. We find D_I = (7.9 ± 0.2)μm²/s, D_II = (2.9 ± 0.1)μm²/s, D_III = (3.7 ± 0.1)μm²/s, and ρ₀ = (1.1 ± 1.0) × 10⁻³μm⁻², where ρ₀ is constrained to be the same for all three fits. For comparison, the swim ring expansion for wild-type is also included, showing that the cms mutants perform comparably with the chemotacting wild-type in agar (to within factors of ∼0.5 to 0.8 at 1 week). Three trials are plotted for each mutant class.