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RWA2 is expressed abundantly in leaves, particularly in trichomes in Arabidopsis. RWA2 expression was analyzed by GUS staining in 3-weeks old Arabidopsis plants, 10 independent transformed lines were tested. (A) The negative control (promoter-less GUS line). (B) A representative RWA2 promoter:GUS fusion line. (C,D) Close-up images of leaves and trichomes in a representative RWA2 promoter:GUS fusion line.
