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.
Of course, higher eukaryotes still respond to environmental signals by regulating their genes. But there is an additional layer of regulation that results from cell-to-cell interactions within the organism that orchestrate development. Specifically, gene expression is controlled on two levels.truhl, K. Fundamentally different logic of gene regulation in eukaryotes and prokaryotes. Cell 98, 1â4 (1999). Sproul, D., Gilbert, N., & Bickmore, W. The role of chromatin structure in regulating the expression of clustered genes.