calculate the atomic composition of a product ion
get a count dictionary of the amino acid composition of a peptide sequence
calculate the monoisotopic mass of a peptide sequence
calculate the monoisotopic mass of a peptide product ion for a given fragment type
calculate the monoisotopic m/z of a peptide product ion for a given fragment type and charge
calculate the atomic composition of a peptide product ion series
Arguments:
count the number of protonizable sites in a peptide sequence
calculate the atomic composition of a peptide sequence
simulate the charge state distribution for a peptide sequence
simulate the charge state distribution for a list of peptide sequences