Sequencing of the genomic region between the exons 1 and 2 showed that the alternative 5'-end is a part of the intron .
sequencing of the genomic region between the exons 1 and 2 showed that the alternative 5'-end is a part of the intron .
O O O O O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O B-DNA_family_or_group O