1
21
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21
GGCGUAAGGA UUACCUAUGC C
LOOP1
10
13
Crystallography ?
? Angstroms
1
G
O3'
30.908 -5.728 16.972
2
G
P
29.757 -5.183 15.973
O3'
27.783 -8.298 11.932
3
C
P
26.826 -7.228 11.189
O3'
22.138 -8.407 8.457
4
G
P
21.259 -7.077 8.186
O3'
15.829 -8.193 7.138
5
U
P
14.937 -6.895 6.779
O3'
10.301 -4.588 8.024
6
A
P
10.189 -3.015 7.663
O3'
6.616 0.079 10.818
7
A
P
6.279 1.621 10.468
O3'
7.215 6.193 14.008
8
G
P
7.663 7.692 13.601
O3'
9.221 11.157 17.788
9
G
P
9.939 12.526 17.310
O3'
13.859 14.430 20.905
10
A
P
14.001 15.931 20.317
O3'
19.656 17.334 20.487
11
U
P
20.227 18.596 19.644
O3'
23.105 20.080 15.443
12
U
P
24.621 20.352 15.909
O3'
27.560 15.512 12.953
13
A
P
29.063 14.945 12.765
O3'
26.373 9.759 13.654
14
C
P
26.728 8.185 13.637
O3'
25.845 7.401 19.053
15
C
P
25.418 5.855 19.250
O3'
22.077 4.720 23.446
16
U
P
22.005 3.106 23.513
O3'
17.037 0.687 24.030
17
A
P
16.965 -0.927 24.105
O3'
12.343 -3.513 24.245
18
U
P
12.857 -4.908 24.878
O3'
11.234 -9.416 22.154
19
G
P
11.897 -10.684 22.904
O3'
13.800 -15.471 20.937
20
C
P
14.905 -16.104 21.934
O3'
19.033 -19.085 20.506
21
C
P
19.974 -19.418 21.779
O3'
25.198 -20.936 20.545
1
21
+
+
c
2
20
+
+
c
3
19
+
+
c
4
18
W
W
c
5
17
-
-
c
7
16
W
W
c
8
15
+
+
c
9
14
+
+
c
11
13
S
W
t
1
21
5
7
16
3
SG1
6
6
SG2
10
13
1
139.486 0.000
2
139.486 55.019
3
139.486 110.038
4
139.486 165.057
5
139.486 220.077
6
139.486 275.096
7
139.486 330.115
8
139.486 385.134
9
139.486 440.153
10
146.927 502.820
11
105.017 550.000
12
41.910 550.000
13
0.000 502.820
14
7.440 440.153
15
7.440 385.134
16
7.440 330.115
17
7.440 220.077
18
7.440 165.057
19
7.440 110.038
20
7.440 55.019
21
7.440 0.000