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Device for microfluidic chemotaxis assays. The main channel is 18 mm long at the edge and 21 mm long in the center. Its height is 8 μm. The bacterial inlet is 151 μm wide, each buffer inlet is 1.51 mm wide, and the total width of the channel is 3.18 mm. The width of each outlet port at its junction with the main channel is 200 μm. The vertical arrow indicates the direction of increasing chemoeffector concentration across the channel.
