This section would be cool if it had a negative option and stuff like,
hydrophobics use Z.
It sorts with a 2x penalty for stop and give precence to more equal distributions,
in case of a tie to less degenerate codons.
Accepts three letter code with first letter capital separated by a space,
or one letter with spaces or not — corner case: SER is Ser + Asp
+ Arg while Ser is Serine.
Please choose at least one amino acid
Chances of a mutation
In frame sequence that was mutagenised. Note that all symbols that aren't
uppecase ATUGC, will be discarded along with a Fasta header (e.g. '>T.
maritima Cystathionine β-lyase'), therefore for masked sequences
Nucleotide mutation matrix
(non-negative numbers. Overall scaling is unimportant as this is taken
from the 'mean number of substitutions per daughter sequence'