One name that jumps out from the list above: Philip Morris Companies Inc, one of the world's largest manufacturers of cigarettes and tobacco products. Philipmorris.com states: The Philip Morris name has long been associated with high quality tobacco products and globally recognized cigarette brands.
A type of gene expression control in bacteria. Transcription of a gene under this type of control is induced only when a repressor protein present in the cell is inactivated.
By the end of the tutorial you should know: 1  How activators and repressors regulate transcription. 2  The regulation of prokaryotic operons via end-product repression and substrate activation. 3  The characteristics of eukaryotic enhancers and silencers. 4  The regulation of tissue-specific expression.