Positive regulator: in the context of geneplugin-autotooltip__default plugin-autotooltip_bigGene: read Chapters 02, 03, 04, 05, and 06 for a definition of gene :-) regulation, a positive regulator is a geneplugin-autotooltip__default plugin-autotooltip_bigGene: read Chapters 02, 03, 04, 05, and 06 for a definition of gene :-) whose activity increases the expressionplugin-autotooltip__default plugin-autotooltip_bigExpression: a term used to describe the idea that the function of a gene is apparent and can be observed. Genes may not always be expressed all the time in all places. of another geneplugin-autotooltip__default plugin-autotooltip_bigGene: read Chapters 02, 03, 04, 05, and 06 for a definition of gene :-). Compare to transactivatorplugin-autotooltip__default plugin-autotooltip_bigTransactivator (activator): a DNA binding protein that binds to promoter sequences to activate the transcription of nearby genes. In the context of gene expression, “activator” is usually a synonym for transactivator. Compare with positive regulator./activatorplugin-autotooltip__default plugin-autotooltip_bigTransactivator (activator): a DNA binding protein that binds to promoter sequences to activate the transcription of nearby genes. In the context of gene expression, “activator” is usually a synonym for transactivator. Compare with positive regulator..