A frequent creationist allegation is that "evolution can't
happen because a protein with a specific sequence of amino acids
is incredibly improbable." Here's an example, from "Answers in
Genesis." However, ignoring all such problems, and many others
that could be detailed, what is the probability of getting just
100 amino acids lined up in a functional manner? Since there are
20 different amino acids involved, it is (1/20)100, which is
10-130. To try to get this in perspective, there are about 1080
fundamental particles (electrons, etc) in the universe. If every
one of those particles were an experiment at getting the right
sequence with all the correct amino acids present, every
microsecond of 15 billion years, that amounts to 4.7 x 10103
experiments. We are still 1027 experiments short of getting an
even chance of it happening. In other words, this is
IMPOSSIBLE!Cytochrome c is a 100 amino acid protein, for all
intents and purposes. But I have demonstrated that it is not
anywhere near as improbable as 10-13