preferred_name: an N-terminal L-alpha-aminoacyl-[peptide] + L-tryptophan => an N-terminal L-tryptophanyl-L-alpha-aminoacyl-[peptide] + H2O
preferred_name_lc: an n-terminal l-alpha-aminoacyl-[peptide] + l-tryptophan => an n-terminal l-tryptophanyl-l-alpha-aminoacyl-[peptide] + h2o
label: an N-terminal L-alpha-aminoacyl-[peptide] + L-tryptophan => an N-terminal L-tryptophanyl-L-alpha-aminoacyl-[peptide] + H2O
label_lc: an n-terminal l-alpha-aminoacyl-[peptide] + l-tryptophan => an n-terminal l-tryptophanyl-l-alpha-aminoacyl-[peptide] + h2o