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Histochemical staining of GUS activity in DR5:GUS and DR5:GUS/mes17-1 seedlings. A, DR5:GUS seedlings and DR5:GUS/mes17-1 seedlings were stained for GUS activity for 16 h. B, Quantitative GUS assay of DR5:GUS and DR5:GUS/mes17-1 seedlings. The mean value and sd of GUS activity were calculated from three replicates and represented as nanomoles of 4-methyl umbelliferone per milligram protein per minute, as described in “Materials and Methods.”
