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ROP2 Gene Expression in Arabidopsis Guard Cells.
(A) ROP2 PCR products were amplified from 1 μg of total RNA from guard cell (G) and mesophyll cell (M) protoplasts. PCR was repeated twice with similar results. Actin was used as a loading control.
(B) Histochemical assay of GUS activity in 4-week-old Arabidopsis seedlings expressing ROP2 promoter:GUS fusions. Bar = 50 μm.
