0
P0
P2
P1
1
2
3
4
5
0
1
2
3
4
5
P0
P1
P2
P2
P0
P1
P2
P0
P1
7
14
0
7
14
0
7
14
0
5
0
single base
R-to-L bot strand entry
L-to-R top strand entry
R-to-L top strand entry
L-to-R bot strand entry
3’ end (L-to-R)
3’ end (R-to-L)
5’ end (L-to-R)
5’ end (R-to-L)
123
123
123
123