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Activation of F3′5′H and cytochrome b5 promoters in transiently transformed poplar suspension cells. The F3′5′H and cytochrome b5 promoter fragments were cloned upstream of the luciferase reporter gene. Renilla was used as a normalizer gene. Plasmids for promoter-luciferase reporter constructs were cobombarded with MYB and bHLH effector constructs and assayed as described. All data points represent means of at least four biological replicates. Error bars represent se.
