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• constitutive = continuous expression

CaMV 35S, actin, ubiquitin

• developmentally regulated

alpha-amylase

• chemically inducible

glutathione-S-transferase

picture of callus clumps sprinkled with small blue spots showing regions of gusA gene expression

Gene expression. Ubiquitin promoter driving expression of the reporter gene gusA in transgenic rice cell culture.

Image compliments of UCD Biotechnology Program.

Promoters for expression of nuclear transgenes

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