tokens: The reason that only certain individuals of particular major histocompatibility complex ( MHC ) haplotypes can mount T-cell responses against a given antigen of pathogens is found in the fact that T-cell receptors are designed to recognize 18-20 residue-long peptide fragments sandwiched between two alpha-helices of class I or class II MHC molecules .
folded_tokens: the reason that only certain individuals of particular major histocompatibility complex ( mhc ) haplotypes can mount t-cell responses against a given antigen of pathogens is found in the fact that t-cell receptors are designed to recognize 18-20 residue-long peptide fragments sandwiched between two alpha-helices of class i or class ii mhc molecules .
labels: O O O O O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O B-other_name I-other_name O O O O O O O O O O O O B-protein_family_or_group I-protein_family_or_group O O O O B-peptide I-peptide I-peptide I-peptide O O O B-protein_substructure O B-protein_family_or_group I-protein_family_or_group O B-protein_N/A I-protein_N/A I-protein_N/A I-protein_N/A O