Every cell and organism faces the problem of spaces, made up of the two leaflets of the lipid generating a confined space in which metabolic bilayer. The importance of traffic and signaling across membranes is reflected by the estimate and anabolic reactions take place and at the same time allowing entry and exit of metabo that 20% of all genes in the human genome encode membrane proteins. A failure of any of lites, ions, proteins, and signals across its bor der. Evolution has solved the problem by these proteins may have dramatic con se generating lipid membranes that contain trans quences...