tokens: Using interspecies hybrids , the segregation of human chromosomes allowed us to establish that MHC class II extinction is linked to the presence in the hybrids of the chromosomes from the epithelial fusion partner .
folded_tokens: using interspecies hybrids , the segregation of human chromosomes allowed us to establish that mhc class ii extinction is linked to the presence in the hybrids of the chromosomes from the epithelial fusion partner .
labels: O O O O O O O B-DNA_molecule I-DNA_molecule O O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O O O O O O O O B-DNA_family_or_group O O B-cell_type I-cell_type I-cell_type O