tokens: TCR -contact site heterogeneity was excluded as the selective force in diversity generation since the epitope-encoded sequences were found to be identical within endogenous virus isolates .
folded_tokens: tcr -contact site heterogeneity was excluded as the selective force in diversity generation since the epitope-encoded sequences were found to be identical within endogenous virus isolates .
labels: B-protein_family_or_group O O O O O O O O O O O O O O O O O O O O O O B-virus I-virus I-virus O