Sequences of the swine 21-hydroxylase gene (CYP21) and a portion of the opposite-strand overlapping gene of unknown function previously described in human.

We sequenced a 4.8 kb BamHI swine genomic fragment comprising the entire 21-hydroxylase gene (CYP21) and its 5' and 3' flanking segments. The CYP21 coding sequence spanned 3050 bp and as in other species, comprised 10 exons separated by the corresponding introns.