Fig. 4
Accumulation profiles of E. coli from an unsorted and a sorted population. The accumulation profile of E. coli from the unsorted population (green) in the single-junction device is compared to the accumulation profile of the sorted population (purple) at the last junction (junction 4) in the T-maze for the linear-sensing (a) and log-sensing (b) regime. The gradient generated over the single-junction device corresponds to that in the last junction of the T-maze. The fitted slope of the bacterial accumulation profile in the portion of the junction up the gradient (to the right of the dashed line) is shown for each case. Figures show mean ± s.d. over two (unsorted) or three (sorted) replicates
