Bear in mind that the conventional wisdom is that blind, natural, purposeless forces are all that's necessary to explain how this system came to exist. Darwinians have been selling us the biological equivalent of swampland real estate for over a hundred years and we keep buying it. At some point, though, we need to stop and ask exactly what it is they're asking us to believe.
In this case, one of perhaps thousands which could be cited, they're asking us to accept that unguided random chance could have solved the problem of DNA supercoiling very early on in evolutionary history. In other words, systems like this, of which there are hundreds if not thousands in living cells, arose through pure accident, we're told. Uh huh. And the gullible among us say it must be so for nop weightier reason than that Richard Dawkins says it is.
For another astonishing glimpse at the complexity of cellular micro-structure check out this video simulation of protein translation and remember that what is being shown is only a fraction of the complexity of the system that works continuosly in every cell in every living thing in the world.
It's literally breathtaking.RLC