This exon was inserted between glutamine-rich regions 2 and 3 , carboxy terminal of a tentative leucine-zipper structure .
this exon was inserted between glutamine-rich regions 2 and 3 , carboxy terminal of a tentative leucine-zipper structure .
O O O O B-DNA_domain_or_region 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 O B-protein_domain_or_region I-protein_domain_or_region O O O B-protein_substructure I-protein_substructure O