NC_021224.1.raw NC_021224.1 circular NC_021225.1.raw NC_021225.1 circular NC_021226.1.raw NC_021226.1 circular NC_021227.1.raw NC_021227.1 circular NC_021228.1.raw NC_021228.1 circular NC_021233.1.raw NC_021233.1 circular NC_021234.1.raw NC_021234.1 circular