My thanks to Cofty for this review of argument incorporating the cytochrome c family of proteins.
Did life emerge on its own or not? What is the tested reality?
Modern biochemistry has shown that any “cooperative self-replicating system” (including any hypothetical protobiont) is (or would have been) operated by teams of molecular machines—PROTEINS. Proteins are the machines within living things that build the structures and carry out the chemical reactions necessary for life.
Cytochrome c, for example, is absolutely essential for life - organisms that lack it cannot live. The mitochondria of cells contain cytochrome c, where it transports electrons in the fundamental metabolic process of oxidative phosphorylation. Oxygen is used to generate energy in this process.
Only about a third of the 100 amino acids in cytochrome c are necessary to specify its function. Hubert Yockey has done a careful study in which he calculated that there are a minimum of 2.3 x 10^93 possible functional cytochrome c protein sequences
What is the probability that one functional cytochrome c protein sequence emerged on its own from the primordial soup?
By the numbers:
100 amino acids in the cytochrome c sequence.
500 amino acids in the primordial soup.
So we have 500^100 or 10^269 possible sequences.
Now suppose there are 10^93 possible functional cytochrome c protein sequences.
There is 1 chance in 10^176 that a functional cytochrome c sequence emerged on its own from the primordial soup.
Of course one functional protein is not alive. But, if cytochrome c could have beat the odds, there it was ready to transport some electrons in the fundamental metabolic process of oxidative phosphorylation. Too bad the rest of the team didn’t make it.
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Did life emerge on its own or not? What is the tested reality?
What is the probability that the Big Bang eventually produced an environment suitable for life?
Next week.