tokens: While the MHC-peptide complexes formed with the native peptide are stable , complexes formed with the Ala -substituted peptide had a functional t1/2 of less than 4 hr at neutral pH .
folded_tokens: while the mhc-peptide complexes formed with the native peptide are stable , complexes formed with the ala -substituted peptide had a functional t1/2 of less than 4 hr at neutral ph .
labels: O O B-protein_complex I-protein_complex O O O B-peptide I-peptide O O O O O O O B-amino_acid_monomer O O O O O O O O O O O O B-other_name I-other_name O