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Shifting the auxin maximum by changing the ratio of lateral PINs in the cortex. All maxima are induced by 10-fold decreased efflux (Effl↓). The cartoon on top shows the ratio of peripheral to central lateral PINs in each cortical cell of the root segment. The original DZ segment is indicated with*. Note that in all cases the highest concentration in the controlled area is well above the vascular concentration Cv.
