Chest pain and shortness of breath if blood clots form in the blood vessels in your lungs and heart. Pain, redness, warmth, and swelling in the lower leg if blood clots form in the deep veins of your leg. Headaches, speech changes, paralysis (an inability to move), dizziness, and trouble speaking and understanding if blood clots form in the blood vessels in your brain. These signs and symptoms may indicate a stroke.
From Wikipedia, the free encyclopedia. A gene knockout (abbreviation: KO) is a genetic technique in which one of an organism 's genes is made inoperative (knocked out of the organism). knockout mouse (left) that is a model of obesity, compared with a normal mouse. A conditional knockout allows gene deletion in a tissue or time specific manner. This is done by introducing short sequences called loxP sites around the gene.
Definition. Gene regulation is the informal term used to describe any mechanism used by a cell to increase or decrease the production of specific gene products (protein or RNA).Cells can modify their gene expression patterns to trigger developmental pathways, respond to environmental stimuli, or adapt to new food sources.n example is the sigma factors used in prokaryotic transcription. 2. All genes have an upstream coding sequence called an operator. Repressor proteins can bind to an operator region and inhibit the ability of RNA polymerase to transcribe the gene. This causes decreased expression of a gene. 3.