These involve changing the body's natural protein to improve it.

Until now, scientists have improved natural proteins by making specific changes to them, a process called protein engineering.

The next question might arise over the technology of protein engineering, in which natural proteins can be changed.

Also important are improvements in techniques to determine the structure of natural proteins.

They work by reacting with the skin's natural proteins to turn the top layer of the skin an authentic brown.

However, for natural proteins this is not the case.

By copying the action of the natural protein, the drug works with the immune system to help control the symptoms.

The substance is derived from a natural human protein.

It is believed to be the first natural human protein found to have such a configuration.

Why should natural proteins fold in a way that scientists will find easy to predict?