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