The Ala -substituted peptide was recognized by the T cell clone at neutral pH only when it was present in the APC culture throughout the stimulation process .
the ala -substituted peptide was recognized by the t cell clone at neutral ph only when it was present in the apc culture throughout the stimulation process .
O B-amino_acid_monomer O B-peptide O O O O B-cell_line I-cell_line I-cell_line O B-other_name I-other_name O O O O O O O B-cell_type O O O O O O