Group I catalytic intron
Group II catalytic intron
Group II catalytic intron D1-D4-1
Group II catalytic intron D1-D4-2
Group II catalytic intron D1-D4-3
Group II catalytic intron D1-D4-4
Group II catalytic intron D1-D4-5
Group II catalytic intron D1-D4-6
Group II catalytic intron D1-D4-7
