Cells control the tuning, or expression, of genes by keeping a tight rein on RNA polymerase.
For genes that are strongly on, cells use special molecular tags to lure in RNA polymerase and to ensure that the machine works overtime transcribing those genes.
For genes that are off, cells use different tags to repel RNA polymerase.
Muscle cells bear little physical resemblance to white blood cells.
Yet every cell (with just a few exceptions) is encased in a membrane, contains a nucleus full of genes, and has ribosomes, mitochondria, ER, and Golgi. Despite decades of hard work, cell biologists still don't fully understand how developing cells turn into all the different types in your body.
But they do know that this process, called differentiation, is governed by genes.Your body "tunes" the genes of each cell type differently. is your one stop website for all businesses within Nevada.We have compiled many different Nevada yellow page books and made them all accessible easily through this website.
Simply enter what kind of business you are looking for and where, and get a comprehensive list of businesses which match your search.Our website includes professionals who offer services as well.