tokens: The TCL1 gene sequence , which , to our knowledge , shows no sequence homology with other human genes , is preferentially expressed early in T- and B- lymphocyte differentiation .
folded_tokens: the tcl1 gene sequence , which , to our knowledge , shows no sequence homology with other human genes , is preferentially expressed early in t- and b- lymphocyte differentiation .
labels: O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O O O O O O B-DNA_family_or_group I-DNA_family_or_group O O O O O O O O O O O O