A Defending Crusader…

The best defense is to be good and offensive…or something like that.

Odds and Ends

Posted by Godefroi on September 22, 2010

There’s nothing like a little exercise in statistics to brighten one’s morning…

Probability(1) of building a chain of 150 amino acids in which all linkages are peptide linkages:  »1 in 1045

Probability(2) of randomly attaining only L-amino acids in a peptide chain 150 amino acids long: »1 in 1045

Probability(3) of getting a specific required amino acid at a specific required site: »1 in 20

Probability(4) of getting any particular protein 150 amino acids long: »1 in 10195

Probability(5) of randomly producing a functional protein 150 amino acids long:  »1 in 1074

Probability(6) that a random 150-amino-acid compound would be a functional protein: »1 in 10164

“If we assume that a minimally complex cell needs at least 250 proteins of, on average, 150 amino acids and that the probability of producing just one such protein is 1 in 10164  as calculated above, then the probability of producing all the necessary proteins needed to service a minimally complex cell is (1 in 10164) multiplied by itelf 250 times, or 1 in 1041,000.”

 — Stephen C. Meyer, PhD “Signature in the Cell” © 2009, pg 214

In light of the above, did life spontaneously generate from non-living “stuff” in the proverbial primordial soup?


 1: Peptide vs non-peptide 150 times -> (½)149

2: Left-hand vs Right-hand 150 times -> (½)149

3: There are 20 biologically occurring amino acids

4: (1/20)150

5:  See Axe, “Estimating the Prevalence of Protein Sequences”

6: Multiplying (1) X (2) X (5) -> 10(45 + 45 + 74)


2 Responses to “Odds and Ends”

  1. Off topic….

    Thanks for stopping by my web site.

    You asked how I’ve been. Well, things are still difficult here in this household. But circumstances have indeed improved.

    I find myself exhausted much of the time. Getting older, I guess.

  2. […] A Defending Crusader […]

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