11.   The altered protein has a different shape, and once a small amount appears in the brain it begins to convert the rest to the dangerous form.

12.   This protein also has the advantage of being the same in all forms of strep, he said.

13.   Proteins typically have very specific functions, such as proteins that act as enzymes or hormones.

14.   Even if the anemone protein has no immediate commercial potential, it could still impart important biochemical knowledge, Fenical said.

15.   Proteins have to be made in living systems, and tobacco has proven to be safer than animals, which can harbor viruses that can infect humans.

16.   Researchers wrote that soy protein has the potential to lower cholesterol, reducing the risk of heart attacks and stroke.

17.   While most proteins are bonded with chemical links, spider-silk proteins have a physical bond, making the silk virtually impervious to water.

18.   It now seems clear that proteins have multiple roles.