tokens: The extent to which peptides containing chemically and post-translationally modified amino acid side chains are recognized by primed CTL has not been clearly defined .
folded_tokens: the extent to which peptides containing chemically and post-translationally modified amino acid side chains are recognized by primed ctl has not been clearly defined .
labels: O O O O B-peptide O O O O O B-protein_substructure I-protein_substructure I-protein_substructure I-protein_substructure O O O B-cell_line I-cell_line O O O O O O