New method takes snapshots of proteins as they fold
People have only 20,000 to 30,000 genes (the number is hotly contested), but they use those genes to make more than 2 million proteins. It's the protein molecules that domost of the work in the human cell. After all, the word protein comes from the Greek prota, meaning "of primary importance."
Proteins are created as chains of amino acids, and these chains of usually fold spontaneously into what is called their "native form" in milliseconds or a few seconds.
A protein's function depends sensitively on its shape. For example, enzymes and the molecules they alter are ...

