The gene consists of at least three exons and spans more than 5 . 6 kb of DNA .
the gene consists of at least three exons and spans more than 5 . 6 kb of dna .
O O O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O