tokens: Most of these cells have rearranged their heavy-chain locus but not their light chain genes , suggesting that an active v-abl protein interferes with this differentiation step .
folded_tokens: most of these cells have rearranged their heavy-chain locus but not their light chain genes , suggesting that an active v-abl protein interferes with this differentiation step .
labels: O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O B-protein_molecule I-protein_molecule O O O O O O