Experimental results.

A. Axonal growth cone with microtubule staining (red) and QD labeling of γ2 sub-unit of GABA_ARs (blue) in the absence of stimulation. The scale bar represents 10 µm. B. Model for the redistribution of the GABA_ARs (blue dots) and MTs reorganization (red lines) in a GC membrane submitted to a GABA gradient (grey arrow). A pipette is placed perpendicularly to the axon axis at ≈100 µm of the GC and ejects GABA periodically (2 Hz) to create a permanent gradient. The average position of the receptors is marked by the black target. C. Time-evolution of the average GABA_ARs position along the x-axis [24]. The red curve is a heuristic fit providing the redistribution half-time  = 10.3+/−0.2 min, amplitude  = 3.6+/−0.1 µm and  = 4.9+/−0.4.