tokens: The genes KOX 4 and KOX 9 , mapped on chromosome 8q24 , were found to be located within a DNA fragment of 450 kb .
folded_tokens: the genes kox 4 and kox 9 , mapped on chromosome 8q24 , were found to be located within a dna fragment of 450 kb .
labels: O O B-DNA_domain_or_region I-DNA_domain_or_region O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-DNA_molecule I-DNA_molecule O O O O O O O O B-DNA_molecule I-DNA_molecule O B-polynucleotide I-polynucleotide O