It's all very well to have a degree in mathematics and try and calculate the probability for proteins forming, but if you don't know - or choose to ignore - the current models of how new proteins are made, and instead use your own naîve model involving everything at random, then no wonder you get a very small probability.
But I'm getting ahead of myself. I just read (don't know why, really) an article by Mike Riddle, President of the Creation Training Initiative:
Does Evolution Have a . . . Chance?
Here's the whole things with my comments in red.
How Charles Darwin Classified His Minerals And Rocks
18 minutes ago in History of Geology