So a mutation in the gene might produce a Raspotee that is incapable of Atpa's activity, which basically means it cannot turn itself off after actually being activated. So this is essentially the off position and this is the on position. And so if we have a mutation that destroys the Atpa's activity of this structure, it will always remain on and always go on to activate Rap proteins which will contain these processes that essentially lead to self growth and division. Now we see that these types of mutated genes that lead to the production of these cells that have cancer characteristics are known as oncology. So this is what an oncogene actually is. Now let's move on to two.