MathBench > Probability

BLAST and (Im)probability

So, how many codes per peptide?


fraction in sci notation

If there are 2.19 × 1099 distinct 165-nucleotide sequences, but only 9.00 × 1068 distinct 53-amino-acid peptides, how many ways (on average) can each peptide be coded?

(To make this problem interactive, turn on javascript!)

I think I have the answer: 0.22 × 1031 , a.k.a. 2.2 × 1030.

Wow! 2.2 × 1030 is 2 million trillion trillion. That's the number of ways (on average) that any given 53-AA protein could be coded. Ten million times more than the number of atoms in a mol. Once again, if your mind isn't boggled, better get it checked out.

comparison of mole and # of ways to make 53-AA dna