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PIN3, PIN4, and PIN7, but not PIN1, are expressed in expanding cotyledon pavement cells. A, PIN1 is expressed in root cells but not in 2-DAG cotyledon pavement cells. B, PIN3, PIN4, and PIN7 are expressed in 2-DAG cotyledon pavement cells. C, Expression of PIN3, PIN4, and PIN7 in the root cortex. FM4-64 was used to visualize the plasma membrane when necessary. Bars = 50 µm.
