The English Translation of "New Work by Thornton's Group"

A non-scientist colleague asked me to write a brief, non-technical summary of my last post. Here's my best shot.

Over time, natural selection will tend to shape a protein as closely as possible to the job it performs. As an analogy, think of a screwdriver. Suppose we started out with a shapeless blob of metal that, by chance, had a little edge sticking out of it. Theoretically we might be able to use that as an inefficient screwdriver of sorts. As time went by and improvements were made...