And we have many, many, many different types of examples of ways in which we can actually modify proteins as well as lipids and thereby diversify their function, thereby increase their capabilities and functionality. Now, the final thing I'd like to mention about sugar molecules is that in plants as well as in bacterial cells, sugars actually make up. The components, are components of cell walls. And cell walls are very important, important because they serve very, very important functions. So they basically protect the sound. They also give the cell structure.