A 10 long protein has 21^10 possible sequences. That is already a hard number to guess-and-check. If you wanted to make a more reasonable length protein, of sa

A 10 long protein has 21^10 possible sequences. That is already a hard number to guess-and-check. If you wanted to make a more reasonable length protein, of say 100-200, you would run out of atoms in the universe to do computations with.