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.
One of the central questions of modern biology is what controls gene expression. As we have previously described, genes must be turned on at the right time, in the right cell. To a first approximation, all the cells in an organism contains the same DNA (with the exception of germ cells and immune cells).ince these sequences are in the DNA (the molecule that is transcribed), they are called cis-regulatory sequences. The second mechanism involves an increase in the elaboration and complexity of proteins (trans-regulatory elements) that regulate gene expression in more complex organisms..