0.039823
0.000000
0.000000
0.000000
0.025169
0.000000
0.000000
0.000000
0.015191
0.000000
0.000000
0.000000
Tereshko, V.
Minasov, G.
Egli, M.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
8
90.00
90.00
90.00
25.111
39.731
65.829
C10 H14 N5 O6 P
331.222
y
2'-DEOXYADENOSINE-5'-MONOPHOSPHATE
DNA linking
C9 H14 N3 O7 P
307.197
y
2'-DEOXYCYTIDINE-5'-MONOPHOSPHATE
DNA linking
C10 H14 N5 O7 P
347.221
y
2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE
DNA linking
C10 H15 N2 O8 P
322.208
y
THYMIDINE-5'-MONOPHOSPHATE
DNA linking
H2 O
18.015
WATER
non-polymer
Mg 2
24.305
MAGNESIUM ION
non-polymer
Rb 1
85.468
RUBIDIUM ION
non-polymer
C10 H14 F N2 O8 P
340.199
n
2'-DEOXY-2'-FLUORO-ARABINO-FURANOSYL THYMINE-5'-PHOSPHATE
DNA linking
N
1
N
O
N
2
N
P
N
3
N
O
N
4
N
O
N
5
N
O
N
6
N
C
N
7
R
C
N
8
N
O
N
9
S
C
N
10
N
O
N
11
N
C
N
12
R
C
Y
13
N
N
Y
14
N
C
Y
15
N
N
Y
16
N
C
Y
17
N
C
N
18
N
N
Y
19
N
N
Y
20
N
C
Y
21
N
N
Y
22
N
C
N
23
N
H
N
24
N
H
N
25
N
H
N
26
N
H
N
27
N
H
N
28
N
H
N
29
N
H
N
30
N
H
N
31
N
H
N
32
N
H
N
33
N
H
N
34
N
H
N
35
N
H
N
36
N
H
N
37
N
O
N
38
N
P
N
39
N
O
N
40
N
O
N
41
N
O
N
42
N
C
N
43
R
C
N
44
N
O
N
45
S
C
N
46
N
O
N
47
N
C
N
48
R
C
N
49
N
N
N
50
N
C
N
51
N
O
N
52
N
N
N
53
N
C
N
54
N
N
N
55
N
C
N
56
N
C
N
57
N
H
N
58
N
H
N
59
N
H
N
60
N
H
N
61
N
H
N
62
N
H
N
63
N
H
N
64
N
H
N
65
N
H
N
66
N
H
N
67
N
H
N
68
N
H
N
69
N
H
N
70
N
H
N
71
N
O
N
72
N
P
N
73
N
O
N
74
N
O
N
75
N
O
N
76
N
C
N
77
R
C
N
78
N
O
N
79
S
C
N
80
N
O
N
81
N
C
N
82
R
C
Y
83
N
N
Y
84
N
C
Y
85
N
N
Y
86
N
C
N
87
N
C
N
88
N
O
N
89
N
N
N
90
N
C
N
91
N
N
N
92
N
N
Y
93
N
C
N
94
N
H
N
95
N
H
N
96
N
H
N
97
N
H
N
98
N
H
N
99
N
H
N
100
N
H
N
101
N
H
N
102
N
H
N
103
N
H
N
104
N
H
N
105
N
H
N
106
N
H
N
107
N
H
N
108
N
O
N
109
N
P
N
110
N
O
N
111
N
O
N
112
N
O
N
113
N
C
N
114
R
C
N
115
N
O
N
116
S
C
N
117
N
O
N
118
N
C
N
119
R
C
N
120
N
N
N
121
N
C
N
122
N
O
N
123
N
N
N
124
N
C
N
125
N
O
N
126
N
C
N
127
N
C
N
128
N
C
N
129
N
H
N
130
N
H
N
131
N
H
N
132
N
H
N
133
N
H
N
134
N
H
N
135
N
H
N
136
N
H
N
137
N
H
N
138
N
H
N
139
N
H
N
140
N
H
N
141
N
H
N
142
N
H
N
143
N
H
N
144
N
O
N
145
N
H
N
146
N
H
N
147
N
MG
N
148
N
RB
N
149
N
P
N
150
N
O
N
151
N
O
N
152
N
O
N
153
N
O
N
154
N
N
N
155
N
C
N
156
N
C
N
157
N
O
N
158
N
N
N
159
N
C
N
160
N
O
N
161
N
C
N
162
N
C
N
163
N
F
N
164
S
C
N
165
N
C
N
166
R
C
N
167
N
O
N
168
R
C
N
169
R
C
N
170
N
O
N
171
N
H
N
172
N
H
N
173
N
H
N
174
N
H
N
175
N
H
N
176
N
H
N
177
N
H
N
178
N
H
N
179
N
H
N
180
N
H
N
181
N
H
N
182
N
H
N
183
N
H
N
184
N
H
N
1
N
sing
N
2
N
sing
N
3
N
doub
N
4
N
sing
N
5
N
sing
N
6
N
sing
N
7
N
sing
N
8
N
sing
N
9
N
sing
N
10
N
sing
N
11
N
sing
N
12
N
sing
N
13
N
sing
N
14
N
sing
N
15
N
sing
N
16
N
sing
N
17
N
sing
N
18
N
sing
N
19
N
sing
N
20
N
sing
N
21
N
sing
N
22
N
sing
N
23
N
sing
Y
24
N
sing
Y
25
N
sing
Y
26
N
doub
N
27
N
sing
Y
28
N
sing
Y
29
N
sing
Y
30
N
doub
N
31
N
sing
Y
32
N
doub
N
33
N
sing
N
34
N
sing
Y
35
N
sing
Y
36
N
doub
N
37
N
sing
Y
38
N
sing
N
39
N
sing
N
40
N
sing
N
41
N
doub
N
42
N
sing
N
43
N
sing
N
44
N
sing
N
45
N
sing
N
46
N
sing
N
47
N
sing
N
48
N
sing
N
49
N
sing
N
50
N
sing
N
51
N
sing
N
52
N
sing
N
53
N
sing
N
54
N
sing
N
55
N
sing
N
56
N
sing
N
57
N
sing
N
58
N
sing
N
59
N
sing
N
60
N
sing
N
61
N
sing
N
62
N
sing
N
63
N
sing
N
64
N
doub
N
65
N
sing
N
66
N
doub
N
67
N
sing
N
68
N
sing
N
69
N
sing
N
70
N
sing
N
71
N
doub
N
72
N
sing
N
73
N
sing
N
74
N
sing
N
75
N
sing
N
76
N
doub
N
77
N
sing
N
78
N
sing
N
79
N
sing
N
80
N
sing
N
81
N
sing
N
82
N
sing
N
83
N
sing
N
84
N
sing
N
85
N
sing
N
86
N
sing
N
87
N
sing
N
88
N
sing
N
89
N
sing
N
90
N
sing
N
91
N
sing
N
92
N
sing
N
93
N
sing
N
94
N
sing
N
95
N
sing
N
96
N
sing
Y
97
N
sing
Y
98
N
sing
Y
99
N
doub
N
100
N
sing
Y
101
N
sing
N
102
N
sing
Y
103
N
doub
N
104
N
doub
N
105
N
sing
N
106
N
sing
N
107
N
sing
N
108
N
sing
N
109
N
doub
N
110
N
sing
N
111
N
sing
N
112
N
sing
N
113
N
sing
N
114
N
sing
N
115
N
doub
N
116
N
sing
N
117
N
sing
N
118
N
sing
N
119
N
sing
N
120
N
sing
N
121
N
sing
N
122
N
sing
N
123
N
sing
N
124
N
sing
N
125
N
sing
N
126
N
sing
N
127
N
sing
N
128
N
sing
N
129
N
sing
N
130
N
sing
N
131
N
sing
N
132
N
sing
N
133
N
sing
N
134
N
sing
N
135
N
sing
N
136
N
sing
N
137
N
sing
N
138
N
doub
N
139
N
sing
N
140
N
sing
N
141
N
sing
N
142
N
doub
N
143
N
sing
N
144
N
sing
N
145
N
doub
N
146
N
sing
N
147
N
sing
N
148
N
sing
N
149
N
sing
N
150
N
sing
N
151
N
sing
N
152
N
sing
N
153
N
sing
N
154
N
doub
N
155
N
sing
N
156
N
sing
N
157
N
sing
N
158
N
sing
N
159
N
sing
N
160
N
sing
N
161
N
sing
N
162
N
doub
N
163
N
sing
N
164
N
doub
N
165
N
sing
N
166
N
sing
N
167
N
sing
N
168
N
doub
N
169
N
sing
N
170
N
sing
N
171
N
sing
N
172
N
sing
N
173
N
sing
N
174
N
sing
N
175
N
sing
N
176
N
sing
N
177
N
sing
N
178
N
sing
N
179
N
sing
N
180
N
sing
N
181
N
sing
N
182
N
sing
N
183
N
sing
N
184
N
sing
N
185
N
sing
N
186
N
sing
N
187
N
sing
N
188
N
sing
US
J.Am.Chem.Soc.
JACSAT
0004
0002-7863
121
3590
3595
-1
A "Hydrat-Ion Spine" in a B-DNA minor groove
1999
10.2210/pdb460d/pdb
pdb_0000460d
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
100
1
CCD
1998-11-13
MARRESEARCH
SINGLE WAVELENGTH
M
x-ray
1
1.10012
1.0
5ID-B
APS
1.10012
SYNCHROTRON
APS BEAMLINE 5ID-B
3681.383
DNA (5'-D(*CP*GP*CP*GP*AP*AP*(TAF)P*TP*CP*GP*CP*G)-3')
2
syn
polymer
24.305
MAGNESIUM ION
3
syn
non-polymer
85.468
RUBIDIUM ION
1
syn
non-polymer
18.015
water
189
nat
water
no
yes
(DC)(DG)(DC)(DG)(DA)(DA)(TAF)(DT)(DC)(DG)(DC)(DG)
CGCGAATTCGCG
A,B
polydeoxyribonucleotide
n
n
n
n
n
n
n
n
n
n
n
n
1
2.23
44.84
VAPOR DIFFUSION, SITTING DROP
6.9
SITTING DROPLETS CONTAINING 1.2 MM OLIGONUCLEOTIDE, 20 MM RB CACODYLATE PH 6.9, 25 MM MAGNESIUM ACETATE, 3.2 MM SPERMINE TETRACLORIDE AGAINST RESERVOIR OF 40% MPD, VAPOR DIFFUSION, SITTING DROP, temperature 275K
275
RB CACODYLATE
1
ONUCLEMAGNESIUM ACETATE
1
SPERMINE
1
MPD
2
5.264
1
19
A
1
B
24
0.255
A_DC1:DG24_B
1
-16.328
0.230
0.097
-0.158
4.373
1
19
A
2
B
23
-3.309
A_DG2:DC23_B
2
-6.419
-0.202
0.257
-0.140
-1.930
1
19
A
3
B
22
0.205
A_DC3:DG22_B
3
-6.531
0.137
0.253
-0.119
13.960
1
19
A
4
B
21
0.066
A_DG4:DC21_B
4
-9.384
-0.201
0.063
-0.096
6.091
1
20
A
5
B
20
0.731
A_DA5:DT20_B
5
-15.345
0.027
-0.076
-0.094
3.230
1
20
A
6
B
19
4.908
A_DA6:TAF19_B
6
-17.730
0.034
0.162
-0.095
-2.275
1
20
A
7
B
18
4.391
A_TAF7:DA18_B
7
-18.480
-0.013
0.177
-0.092
-2.263
1
20
A
8
B
17
2.249
A_DT8:DA17_B
8
-14.280
-0.081
-0.019
-0.154
-13.544
1
19
A
9
B
16
-0.867
A_DC9:DG16_B
9
-7.787
0.255
0.098
-0.104
6.026
1
19
A
10
B
15
3.716
A_DG10:DC15_B
10
-7.642
-0.090
0.382
-0.072
2.674
1
19
A
11
B
14
-0.926
A_DC11:DG14_B
11
-16.089
0.066
0.250
-0.112
10.462
1
19
A
12
B
13
-3.812
A_DG12:DC13_B
12
27.428
-0.857
-0.492
-0.134
3.295
35.012
A
A
1
2
8.059
B
B
24
23
3.309
4.833
-0.302
0.053
AA_DC1DG2:DC23DG24_BB
1
-1.224
2.040
34.667
-0.649
0.316
3.445
41.451
A
A
2
3
-5.304
B
B
23
22
3.498
-3.749
0.693
0.511
AA_DG2DC3:DG22DC23_BB
2
0.289
-0.409
41.287
1.147
-0.946
3.070
27.546
A
A
3
4
20.378
B
B
22
21
3.076
9.495
-0.369
0.669
AA_DC3DG4:DC21DG22_BB
3
2.693
-5.780
25.749
-0.855
1.417
3.382
40.364
A
A
4
5
4.433
B
B
21
20
3.403
3.056
-0.029
-0.151
AA_DG4DA5:DT20DC21_BB
4
0.402
-0.583
40.251
-0.576
0.088
3.221
34.785
A
A
5
6
0.939
B
B
20
19
3.241
0.561
0.203
-0.481
AA_DA5DA6:TAF19DT20_BB
5
-1.653
2.766
34.742
-0.889
-0.588
3.353
30.238
A
A
6
7
-2.969
B
B
19
18
3.319
-1.548
-0.053
-0.757
AA_DA6TAF7:DA18TAF19_BB
6
-0.259
0.496
30.199
-1.131
0.049
3.183
35.558
A
A
7
8
-2.854
B
B
18
17
3.183
-1.741
-0.091
-0.389
AA_TAF7DT8:DA17DA18_BB
7
2.663
-4.367
35.420
-0.390
0.528
3.485
43.116
A
A
8
9
-2.136
B
B
17
16
3.477
-1.569
-0.168
-0.269
AA_DT8DC9:DG16DA17_BB
8
-0.293
0.399
43.088
-0.202
0.198
2.908
26.875
A
A
9
10
6.421
B
B
16
15
2.963
2.969
0.623
0.690
AA_DC9DG10:DC15DG16_BB
9
-3.733
8.074
26.456
0.794
-2.210
3.310
45.374
A
A
10
11
-14.999
B
B
15
14
3.479
-11.450
-1.313
0.590
AA_DG10DC11:DG14DC15_BB
10
-2.940
3.852
43.886
1.837
1.426
3.298
34.610
A
A
11
12
-25.069
B
B
14
13
3.647
-14.450
1.277
0.368
AA_DC11DG12:DC13DG14_BB
11
3.917
-6.796
31.294
3.111
-1.472
chem_comp_atom
chem_comp_bond
database_2
pdbx_struct_conn_angle
struct_conn
struct_site
repository
Initial release
Version format compliance
Version format compliance
Data collection
Database references
Derived calculations
1
0
1999-04-08
1
1
2008-05-22
1
2
2011-07-13
1
3
2024-02-28
_database_2.pdbx_DOI
_database_2.pdbx_database_accession
_pdbx_struct_conn_angle.ptnr1_auth_asym_id
_pdbx_struct_conn_angle.ptnr1_auth_comp_id
_pdbx_struct_conn_angle.ptnr1_auth_seq_id
_pdbx_struct_conn_angle.ptnr1_label_asym_id
_pdbx_struct_conn_angle.ptnr1_label_atom_id
_pdbx_struct_conn_angle.ptnr1_label_comp_id
_pdbx_struct_conn_angle.ptnr1_label_seq_id
_pdbx_struct_conn_angle.ptnr1_symmetry
_pdbx_struct_conn_angle.ptnr2_auth_asym_id
_pdbx_struct_conn_angle.ptnr2_auth_comp_id
_pdbx_struct_conn_angle.ptnr2_auth_seq_id
_pdbx_struct_conn_angle.ptnr2_label_asym_id
_pdbx_struct_conn_angle.ptnr2_label_atom_id
_pdbx_struct_conn_angle.ptnr2_label_comp_id
_pdbx_struct_conn_angle.ptnr3_auth_asym_id
_pdbx_struct_conn_angle.ptnr3_auth_comp_id
_pdbx_struct_conn_angle.ptnr3_auth_seq_id
_pdbx_struct_conn_angle.ptnr3_label_asym_id
_pdbx_struct_conn_angle.ptnr3_label_atom_id
_pdbx_struct_conn_angle.ptnr3_label_comp_id
_pdbx_struct_conn_angle.ptnr3_label_seq_id
_pdbx_struct_conn_angle.ptnr3_symmetry
_pdbx_struct_conn_angle.value
_struct_conn.conn_type_id
_struct_conn.id
_struct_conn.pdbx_dist_value
_struct_conn.pdbx_leaving_atom_flag
_struct_conn.ptnr1_auth_asym_id
_struct_conn.ptnr1_auth_comp_id
_struct_conn.ptnr1_auth_seq_id
_struct_conn.ptnr1_label_asym_id
_struct_conn.ptnr1_label_atom_id
_struct_conn.ptnr1_label_comp_id
_struct_conn.ptnr1_label_seq_id
_struct_conn.ptnr1_symmetry
_struct_conn.ptnr2_auth_asym_id
_struct_conn.ptnr2_auth_comp_id
_struct_conn.ptnr2_auth_seq_id
_struct_conn.ptnr2_label_asym_id
_struct_conn.ptnr2_label_atom_id
_struct_conn.ptnr2_label_comp_id
_struct_conn.ptnr2_label_seq_id
_struct_conn.ptnr2_symmetry
_struct_site.pdbx_auth_asym_id
_struct_site.pdbx_auth_comp_id
_struct_site.pdbx_auth_seq_id
NDB
Y
NDB
1999-03-12
REL
REL
MG
MAGNESIUM ION
RB
RUBIDIUM ION
HOH
water
MG
25
2
MG
MG
25
A
RB
110
3
RB
RB
110
B
MG
32
2
MG
MG
32
B
MG
38
2
MG
MG
38
B
TIP
26
4
HOH
HOH
26
A
TIP
28
4
HOH
HOH
28
A
TIP
39
4
HOH
HOH
39
A
TIP
40
4
HOH
HOH
40
A
TIP
43
4
HOH
HOH
43
A
TIP
53
4
HOH
HOH
53
A
TIP
57
4
HOH
HOH
57
A
TIP
60
4
HOH
HOH
60
A
TIP
61
4
HOH
HOH
61
A
TIP
62
4
HOH
HOH
62
A
TIP
63
4
HOH
HOH
63
A
TIP
64
4
HOH
HOH
64
A
TIP
65
4
HOH
HOH
65
A
TIP
67
4
HOH
HOH
67
A
TIP
68
4
HOH
HOH
68
A
TIP
76
4
HOH
HOH
76
A
TIP
78
4
HOH
HOH
78
A
TIP
101
4
HOH
HOH
101
A
TIP
102
4
HOH
HOH
102
A
TIP
103
4
HOH
HOH
103
A
TIP
106
4
HOH
HOH
106
A
TIP
107
4
HOH
HOH
107
A
TIP
108
4
HOH
HOH
108
A
TIP
112
4
HOH
HOH
112
A
TIP
113
4
HOH
HOH
113
A
TIP
114
4
HOH
HOH
114
A
TIP
117
4
HOH
HOH
117
A
TIP
118
4
HOH
HOH
118
A
TIP
120
4
HOH
HOH
120
A
TIP
122
4
HOH
HOH
122
A
TIP
123
4
HOH
HOH
123
A
TIP
124
4
HOH
HOH
124
A
TIP
125
4
HOH
HOH
125
A
TIP
126
4
HOH
HOH
126
A
TIP
133
4
HOH
HOH
133
A
TIP
134
4
HOH
HOH
134
A
TIP
135
4
HOH
HOH
135
A
TIP
138
4
HOH
HOH
138
A
TIP
139
4
HOH
HOH
139
A
TIP
140
4
HOH
HOH
140
A
TIP
141
4
HOH
HOH
141
A
TIP
142
4
HOH
HOH
142
A
TIP
146
4
HOH
HOH
146
A
TIP
147
4
HOH
HOH
147
A
TIP
149
4
HOH
HOH
149
A
TIP
150
4
HOH
HOH
150
A
TIP
152
4
HOH
HOH
152
A
TIP
153
4
HOH
HOH
153
A
TIP
154
4
HOH
HOH
154
A
TIP
155
4
HOH
HOH
155
A
TIP
156
4
HOH
HOH
156
A
TIP
157
4
HOH
HOH
157
A
TIP
158
4
HOH
HOH
158
A
TIP
159
4
HOH
HOH
159
A
TIP
160
4
HOH
HOH
160
A
TIP
162
4
HOH
HOH
162
A
TIP
165
4
HOH
HOH
165
A
TIP
166
4
HOH
HOH
166
A
TIP
168
4
HOH
HOH
168
A
TIP
169
4
HOH
HOH
169
A
TIP
173
4
HOH
HOH
173
A
TIP
174
4
HOH
HOH
174
A
TIP
177
4
HOH
HOH
177
A
TIP
179
4
HOH
HOH
179
A
TIP
182
4
HOH
HOH
182
A
TIP
184
4
HOH
HOH
184
A
TIP
186
4
HOH
HOH
186
A
TIP
188
4
HOH
HOH
188
A
TIP
190
4
HOH
HOH
190
A
TIP
196
4
HOH
HOH
196
A
TIP
197
4
HOH
HOH
197
A
TIP
198
4
HOH
HOH
198
A
TIP
201
4
HOH
HOH
201
A
TIP
203
4
HOH
HOH
203
A
TIP
208
4
HOH
HOH
208
A
TIP
222
4
HOH
HOH
222
A
TIP
223
4
HOH
HOH
223
A
TIP
227
4
HOH
HOH
227
A
TIP
232
4
HOH
HOH
232
A
TIP
235
4
HOH
HOH
235
A
TIP
243
4
HOH
HOH
243
A
TIP
247
4
HOH
HOH
247
A
TIP
249
4
HOH
HOH
249
A
TIP
252
4
HOH
HOH
252
A
TIP
259
4
HOH
HOH
259
A
TIP
265
4
HOH
HOH
265
A
TIP
266
4
HOH
HOH
266
A
TIP
267
4
HOH
HOH
267
A
TIP
268
4
HOH
HOH
268
A
TIP
271
4
HOH
HOH
271
A
TIP
272
4
HOH
HOH
272
A
TIP
273
4
HOH
HOH
273
A
TIP
274
4
HOH
HOH
274
A
TIP
277
4
HOH
HOH
277
A
TIP
1126
4
HOH
HOH
1126
A
TIP
1157
4
HOH
HOH
1157
A
TIP
1159
4
HOH
HOH
1159
A
TIP
1167
4
HOH
HOH
1167
A
TIP
1183
4
HOH
HOH
1183
A
TIP
1186
4
HOH
HOH
1186
A
TIP
1208
4
HOH
HOH
1208
A
TIP
27
4
HOH
HOH
27
B
TIP
29
4
HOH
HOH
29
B
TIP
30
4
HOH
HOH
30
B
TIP
31
4
HOH
HOH
31
B
TIP
33
4
HOH
HOH
33
B
TIP
34
4
HOH
HOH
34
B
TIP
35
4
HOH
HOH
35
B
TIP
36
4
HOH
HOH
36
B
TIP
37
4
HOH
HOH
37
B
TIP
41
4
HOH
HOH
41
B
TIP
42
4
HOH
HOH
42
B
TIP
44
4
HOH
HOH
44
B
TIP
46
4
HOH
HOH
46
B
TIP
48
4
HOH
HOH
48
B
TIP
50
4
HOH
HOH
50
B
TIP
55
4
HOH
HOH
55
B
TIP
56
4
HOH
HOH
56
B
TIP
66
4
HOH
HOH
66
B
TIP
69
4
HOH
HOH
69
B
TIP
70
4
HOH
HOH
70
B
TIP
72
4
HOH
HOH
72
B
TIP
73
4
HOH
HOH
73
B
TIP
74
4
HOH
HOH
74
B
TIP
75
4
HOH
HOH
75
B
TIP
79
4
HOH
HOH
79
B
TIP
104
4
HOH
HOH
104
B
TIP
105
4
HOH
HOH
105
B
TIP
109
4
HOH
HOH
109
B
TIP
111
4
HOH
HOH
111
B
TIP
115
4
HOH
HOH
115
B
TIP
116
4
HOH
HOH
116
B
TIP
119
4
HOH
HOH
119
B
TIP
121
4
HOH
HOH
121
B
TIP
127
4
HOH
HOH
127
B
TIP
128
4
HOH
HOH
128
B
TIP
129
4
HOH
HOH
129
B
TIP
130
4
HOH
HOH
130
B
TIP
131
4
HOH
HOH
131
B
TIP
132
4
HOH
HOH
132
B
TIP
136
4
HOH
HOH
136
B
TIP
137
4
HOH
HOH
137
B
TIP
143
4
HOH
HOH
143
B
TIP
144
4
HOH
HOH
144
B
TIP
145
4
HOH
HOH
145
B
TIP
148
4
HOH
HOH
148
B
TIP
151
4
HOH
HOH
151
B
TIP
161
4
HOH
HOH
161
B
TIP
163
4
HOH
HOH
163
B
TIP
164
4
HOH
HOH
164
B
TIP
167
4
HOH
HOH
167
B
TIP
170
4
HOH
HOH
170
B
TIP
172
4
HOH
HOH
172
B
TIP
175
4
HOH
HOH
175
B
TIP
176
4
HOH
HOH
176
B
TIP
181
4
HOH
HOH
181
B
TIP
183
4
HOH
HOH
183
B
TIP
187
4
HOH
HOH
187
B
TIP
191
4
HOH
HOH
191
B
TIP
192
4
HOH
HOH
192
B
TIP
193
4
HOH
HOH
193
B
TIP
195
4
HOH
HOH
195
B
TIP
199
4
HOH
HOH
199
B
TIP
202
4
HOH
HOH
202
B
TIP
205
4
HOH
HOH
205
B
TIP
207
4
HOH
HOH
207
B
TIP
209
4
HOH
HOH
209
B
TIP
211
4
HOH
HOH
211
B
TIP
213
4
HOH
HOH
213
B
TIP
221
4
HOH
HOH
221
B
TIP
228
4
HOH
HOH
228
B
TIP
230
4
HOH
HOH
230
B
TIP
237
4
HOH
HOH
237
B
TIP
242
4
HOH
HOH
242
B
TIP
245
4
HOH
HOH
245
B
TIP
246
4
HOH
HOH
246
B
TIP
257
4
HOH
HOH
257
B
TIP
263
4
HOH
HOH
263
B
TIP
264
4
HOH
HOH
264
B
TIP
270
4
HOH
HOH
270
B
TIP
278
4
HOH
HOH
278
B
TIP
279
4
HOH
HOH
279
B
TIP
284
4
HOH
HOH
284
B
TIP
285
4
HOH
HOH
285
B
TIP
286
4
HOH
HOH
286
B
TIP
1153
4
HOH
HOH
1153
B
TIP
1174
4
HOH
HOH
1174
B
TIP
1212
4
HOH
HOH
1212
B
TIP
1214
4
HOH
HOH
1214
B
C
1
n
1
DC
1
A
G
2
n
2
DG
2
A
C
3
n
3
DC
3
A
G
4
n
4
DG
4
A
A
5
n
5
DA
5
A
A
6
n
6
DA
6
A
TAF
7
n
7
TAF
7
A
T
8
n
8
DT
8
A
C
9
n
9
DC
9
A
G
10
n
10
DG
10
A
C
11
n
11
DC
11
A
G
12
n
12
DG
12
A
C
13
n
1
DC
13
B
G
14
n
2
DG
14
B
C
15
n
3
DC
15
B
G
16
n
4
DG
16
B
A
17
n
5
DA
17
B
A
18
n
6
DA
18
B
TAF
19
n
7
TAF
19
B
T
20
n
8
DT
20
B
C
21
n
9
DC
21
B
G
22
n
10
DG
22
B
C
23
n
11
DC
23
B
G
24
n
12
DG
24
B
author_defined_assembly
2
dimeric
A
TAF
7
A
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
A
DT
8
A
O4'
DT
8
1_555
64.9
A
TAF
7
A
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
A
HOH
265
G
O
HOH
1_555
137.8
A
DT
8
A
O4'
DT
8
1_555
B
RB
110
D
RB
RB
1_555
A
HOH
265
G
O
HOH
1_555
75.5
A
TAF
7
A
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
B
TAF
19
B
O2
TAF
7
1_555
79.9
A
DT
8
A
O4'
DT
8
1_555
B
RB
110
D
RB
RB
1_555
B
TAF
19
B
O2
TAF
7
1_555
135.5
A
HOH
265
G
O
HOH
1_555
B
RB
110
D
RB
RB
1_555
B
TAF
19
B
O2
TAF
7
1_555
142.0
A
TAF
7
A
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
B
DT
20
B
O4'
DT
8
1_555
136.1
A
DT
8
A
O4'
DT
8
1_555
B
RB
110
D
RB
RB
1_555
B
DT
20
B
O4'
DT
8
1_555
157.7
A
HOH
265
G
O
HOH
1_555
B
RB
110
D
RB
RB
1_555
B
DT
20
B
O4'
DT
8
1_555
82.2
B
TAF
19
B
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
B
DT
20
B
O4'
DT
8
1_555
65.4
A
TAF
7
A
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
131
H
O
HOH
1_555
113.5
A
DT
8
A
O4'
DT
8
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
131
H
O
HOH
1_555
76.7
A
HOH
265
G
O
HOH
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
131
H
O
HOH
1_555
68.6
B
TAF
19
B
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
131
H
O
HOH
1_555
94.6
B
DT
20
B
O4'
DT
8
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
131
H
O
HOH
1_555
96.0
A
TAF
7
A
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
145
H
O
HOH
1_555
98.9
A
DT
8
A
O4'
DT
8
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
145
H
O
HOH
1_555
95.1
A
HOH
265
G
O
HOH
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
145
H
O
HOH
1_555
69.6
B
TAF
19
B
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
145
H
O
HOH
1_555
117.5
B
DT
20
B
O4'
DT
8
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
145
H
O
HOH
1_555
76.1
B
HOH
131
H
O
HOH
1_555
B
RB
110
D
RB
RB
1_555
B
HOH
145
H
O
HOH
1_555
138.1
A
HOH
26
G
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
A
HOH
28
G
O
HOH
1_555
90.8
A
HOH
26
G
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
27
H
O
HOH
1_555
174.8
A
HOH
28
G
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
27
H
O
HOH
1_555
86.4
A
HOH
26
G
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
29
H
O
HOH
1_555
89.9
A
HOH
28
G
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
29
H
O
HOH
1_555
173.0
B
HOH
27
H
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
29
H
O
HOH
1_555
93.4
A
HOH
26
G
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
30
H
O
HOH
1_555
95.4
A
HOH
28
G
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
30
H
O
HOH
1_555
85.1
B
HOH
27
H
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
30
H
O
HOH
1_555
88.8
B
HOH
29
H
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
30
H
O
HOH
1_555
87.9
A
HOH
26
G
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
31
H
O
HOH
1_555
90.0
A
HOH
28
G
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
31
H
O
HOH
1_555
94.4
B
HOH
27
H
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
31
H
O
HOH
1_555
85.8
B
HOH
29
H
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
31
H
O
HOH
1_555
92.5
B
HOH
30
H
O
HOH
1_555
A
MG
25
C
MG
MG
1_555
B
HOH
31
H
O
HOH
1_555
174.6
A
HOH
39
G
O
HOH
4_456
B
MG
38
F
MG
MG
1_555
A
HOH
40
G
O
HOH
1_555
88.0
A
HOH
39
G
O
HOH
4_456
B
MG
38
F
MG
MG
1_555
A
HOH
43
G
O
HOH
1_555
92.0
A
HOH
40
G
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
A
HOH
43
G
O
HOH
1_555
96.6
A
HOH
39
G
O
HOH
4_456
B
MG
38
F
MG
MG
1_555
B
HOH
41
H
O
HOH
1_555
169.2
A
HOH
40
G
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
B
HOH
41
H
O
HOH
1_555
100.2
A
HOH
43
G
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
B
HOH
41
H
O
HOH
1_555
94.0
A
HOH
39
G
O
HOH
4_456
B
MG
38
F
MG
MG
1_555
B
HOH
42
H
O
HOH
1_555
99.4
A
HOH
40
G
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
B
HOH
42
H
O
HOH
1_555
172.5
A
HOH
43
G
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
B
HOH
42
H
O
HOH
1_555
83.8
B
HOH
41
H
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
B
HOH
42
H
O
HOH
1_555
72.3
A
HOH
39
G
O
HOH
4_456
B
MG
38
F
MG
MG
1_555
B
HOH
44
H
O
HOH
1_555
89.1
A
HOH
40
G
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
B
HOH
44
H
O
HOH
1_555
97.6
A
HOH
43
G
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
B
HOH
44
H
O
HOH
1_555
165.7
B
HOH
41
H
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
B
HOH
44
H
O
HOH
1_555
82.9
B
HOH
42
H
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
B
HOH
44
H
O
HOH
1_555
82.0
B
TAF
19
B
OP1
TAF
7
3_645
B
MG
32
E
MG
MG
1_555
B
HOH
33
H
O
HOH
1_555
96.2
B
TAF
19
B
OP1
TAF
7
3_645
B
MG
32
E
MG
MG
1_555
B
HOH
34
H
O
HOH
1_555
172.7
B
HOH
33
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
34
H
O
HOH
1_555
87.6
B
TAF
19
B
OP1
TAF
7
3_645
B
MG
32
E
MG
MG
1_555
B
HOH
35
H
O
HOH
1_555
94.4
B
HOH
33
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
35
H
O
HOH
1_555
94.2
B
HOH
34
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
35
H
O
HOH
1_555
91.5
B
TAF
19
B
OP1
TAF
7
3_645
B
MG
32
E
MG
MG
1_555
B
HOH
36
H
O
HOH
1_555
85.3
B
HOH
33
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
36
H
O
HOH
1_555
174.6
B
HOH
34
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
36
H
O
HOH
1_555
90.3
B
HOH
35
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
36
H
O
HOH
1_555
90.8
B
TAF
19
B
OP1
TAF
7
3_645
B
MG
32
E
MG
MG
1_555
B
HOH
37
H
O
HOH
1_555
90.0
B
HOH
33
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
37
H
O
HOH
1_555
80.3
B
HOH
34
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
37
H
O
HOH
1_555
84.5
B
HOH
35
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
37
H
O
HOH
1_555
173.3
B
HOH
36
H
O
HOH
1_555
B
MG
32
E
MG
MG
1_555
B
HOH
37
H
O
HOH
1_555
94.5
A
TAF
7
A
TAF
7
DT
B
TAF
19
B
TAF
7
DT
1.0000000000
0.0000000000
0.0000000000
0.0000000000
1.0000000000
0.0000000000
0.0000000000
0.0000000000
1.0000000000
1_555
x,y,z
identity operation
0.0000000000
0.0000000000
0.0000000000
1
-6.77
0.70
108.00
101.23
A
A
A
O4'
C1'
N1
DC
DC
DC
9
9
9
N
1
-4.30
0.70
108.00
103.70
A
A
A
O4'
C1'
N1
DC
DC
DC
11
11
11
N
1
2.03
0.30
108.30
110.33
B
B
B
O4'
C1'
N9
DG
DG
DG
16
16
16
N
1
-4.33
0.70
108.00
103.67
B
B
B
O4'
C1'
N9
DA
DA
DA
18
18
18
N
1
-5.16
0.80
102.40
97.24
B
B
B
C3'
C2'
C1'
DG
DG
DG
22
22
22
N
0.1790000
0.1790000
1.2
20.0
20661
20661
93.3
1
0.0
1.2
20.0
189
701
4
508
0
0.008
0.021
1.2
20.0
460D
20661
20661
0
0
0.0680000
1
5.8
97.3
0.1150000
1.20
1.24
93.3
phasing
AMoRE
refinement
SHELXL-97
data reduction
DENZO
data scaling
SCALEPACK
A "HYDRAT-ION SPINE" IN A B-DNA MINOR GROOVE
1
N
N
1
N
N
2
N
N
3
N
N
2
N
N
2
N
N
4
N
N
4
N
N
covale
1.602
both
A
DA
6
A
O3'
DA
6
1_555
A
TAF
7
A
P
TAF
7
1_555
covale
1.615
one
A
TAF
7
A
O3'
TAF
7
1_555
A
DT
8
A
P
DT
8
1_555
covale
1.597
both
B
DA
18
B
O3'
DA
6
1_555
B
TAF
19
B
P
TAF
7
1_555
covale
1.597
one
B
TAF
19
B
O3'
TAF
7
1_555
B
DT
20
B
P
DT
8
1_555
metalc
2.774
A
TAF
7
A
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
metalc
3.514
A
DT
8
A
O4'
DT
8
1_555
B
RB
110
D
RB
RB
1_555
metalc
2.208
A
MG
25
C
MG
MG
1_555
A
HOH
26
G
O
HOH
1_555
metalc
2.078
A
MG
25
C
MG
MG
1_555
A
HOH
28
G
O
HOH
1_555
metalc
2.163
A
MG
25
C
MG
MG
1_555
B
HOH
27
H
O
HOH
1_555
metalc
2.150
A
MG
25
C
MG
MG
1_555
B
HOH
29
H
O
HOH
1_555
metalc
2.102
A
MG
25
C
MG
MG
1_555
B
HOH
30
H
O
HOH
1_555
metalc
2.086
A
MG
25
C
MG
MG
1_555
B
HOH
31
H
O
HOH
1_555
metalc
2.156
A
HOH
39
G
O
HOH
4_456
B
MG
38
F
MG
MG
1_555
metalc
2.011
A
HOH
40
G
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
metalc
2.183
A
HOH
43
G
O
HOH
1_555
B
MG
38
F
MG
MG
1_555
metalc
3.292
A
HOH
265
G
O
HOH
1_555
B
RB
110
D
RB
RB
1_555
metalc
2.201
B
TAF
19
B
OP1
TAF
7
3_645
B
MG
32
E
MG
MG
1_555
metalc
2.732
B
TAF
19
B
O2
TAF
7
1_555
B
RB
110
D
RB
RB
1_555
metalc
3.317
B
DT
20
B
O4'
DT
8
1_555
B
RB
110
D
RB
RB
1_555
metalc
1.812
B
MG
32
E
MG
MG
1_555
B
HOH
33
H
O
HOH
1_555
metalc
2.192
B
MG
32
E
MG
MG
1_555
B
HOH
34
H
O
HOH
1_555
metalc
1.982
B
MG
32
E
MG
MG
1_555
B
HOH
35
H
O
HOH
1_555
metalc
2.076
B
MG
32
E
MG
MG
1_555
B
HOH
36
H
O
HOH
1_555
metalc
2.238
B
MG
32
E
MG
MG
1_555
B
HOH
37
H
O
HOH
1_555
metalc
2.090
B
MG
38
F
MG
MG
1_555
B
HOH
41
H
O
HOH
1_555
metalc
2.241
B
MG
38
F
MG
MG
1_555
B
HOH
42
H
O
HOH
1_555
metalc
2.178
B
MG
38
F
MG
MG
1_555
B
HOH
44
H
O
HOH
1_555
metalc
2.900
B
RB
110
D
RB
RB
1_555
B
HOH
131
H
O
HOH
1_555
metalc
2.840
B
RB
110
D
RB
RB
1_555
B
HOH
145
H
O
HOH
1_555
hydrog
WATSON-CRICK
A
DC
1
A
N3
DC
1
1_555
B
DG
24
B
N1
DG
12
1_555
hydrog
WATSON-CRICK
A
DC
1
A
N4
DC
1
1_555
B
DG
24
B
O6
DG
12
1_555
hydrog
WATSON-CRICK
A
DC
1
A
O2
DC
1
1_555
B
DG
24
B
N2
DG
12
1_555
hydrog
WATSON-CRICK
A
DG
2
A
N1
DG
2
1_555
B
DC
23
B
N3
DC
11
1_555
hydrog
WATSON-CRICK
A
DG
2
A
N2
DG
2
1_555
B
DC
23
B
O2
DC
11
1_555
hydrog
WATSON-CRICK
A
DG
2
A
O6
DG
2
1_555
B
DC
23
B
N4
DC
11
1_555
hydrog
WATSON-CRICK
A
DC
3
A
N3
DC
3
1_555
B
DG
22
B
N1
DG
10
1_555
hydrog
WATSON-CRICK
A
DC
3
A
N4
DC
3
1_555
B
DG
22
B
O6
DG
10
1_555
hydrog
WATSON-CRICK
A
DC
3
A
O2
DC
3
1_555
B
DG
22
B
N2
DG
10
1_555
hydrog
WATSON-CRICK
A
DG
4
A
N1
DG
4
1_555
B
DC
21
B
N3
DC
9
1_555
hydrog
WATSON-CRICK
A
DG
4
A
N2
DG
4
1_555
B
DC
21
B
O2
DC
9
1_555
hydrog
WATSON-CRICK
A
DG
4
A
O6
DG
4
1_555
B
DC
21
B
N4
DC
9
1_555
hydrog
WATSON-CRICK
A
DA
5
A
N1
DA
5
1_555
B
DT
20
B
N3
DT
8
1_555
hydrog
WATSON-CRICK
A
DA
5
A
N6
DA
5
1_555
B
DT
20
B
O4
DT
8
1_555
hydrog
WATSON-CRICK
A
DA
6
A
N1
DA
6
1_555
B
TAF
19
B
N3
TAF
7
1_555
hydrog
WATSON-CRICK
A
DA
6
A
N6
DA
6
1_555
B
TAF
19
B
O4
TAF
7
1_555
hydrog
WATSON-CRICK
A
TAF
7
A
N3
TAF
7
1_555
B
DA
18
B
N1
DA
6
1_555
hydrog
WATSON-CRICK
A
TAF
7
A
O4
TAF
7
1_555
B
DA
18
B
N6
DA
6
1_555
hydrog
WATSON-CRICK
A
DT
8
A
N3
DT
8
1_555
B
DA
17
B
N1
DA
5
1_555
hydrog
WATSON-CRICK
A
DT
8
A
O4
DT
8
1_555
B
DA
17
B
N6
DA
5
1_555
hydrog
WATSON-CRICK
A
DC
9
A
N3
DC
9
1_555
B
DG
16
B
N1
DG
4
1_555
hydrog
WATSON-CRICK
A
DC
9
A
N4
DC
9
1_555
B
DG
16
B
O6
DG
4
1_555
hydrog
WATSON-CRICK
A
DC
9
A
O2
DC
9
1_555
B
DG
16
B
N2
DG
4
1_555
hydrog
WATSON-CRICK
A
DG
10
A
N1
DG
10
1_555
B
DC
15
B
N3
DC
3
1_555
hydrog
WATSON-CRICK
A
DG
10
A
N2
DG
10
1_555
B
DC
15
B
O2
DC
3
1_555
hydrog
WATSON-CRICK
A
DG
10
A
O6
DG
10
1_555
B
DC
15
B
N4
DC
3
1_555
hydrog
WATSON-CRICK
A
DC
11
A
N3
DC
11
1_555
B
DG
14
B
N1
DG
2
1_555
hydrog
WATSON-CRICK
A
DC
11
A
N4
DC
11
1_555
B
DG
14
B
O6
DG
2
1_555
hydrog
WATSON-CRICK
A
DC
11
A
O2
DC
11
1_555
B
DG
14
B
N2
DG
2
1_555
hydrog
WATSON-CRICK
A
A
DG
12
A
N1
DG
12
1_555
B
DC
13
B
N3
DC
1
1_555
hydrog
WATSON-CRICK
A
A
DG
12
A
N2
DG
12
1_555
B
DC
13
B
O2
DC
1
1_555
hydrog
WATSON-CRICK
A
A
DG
12
A
O6
DG
12
1_555
B
DC
13
B
N4
DC
1
1_555
DNA
B-DNA, DODECAMER DUPLEX, TYPE 1 RB+ FORM CRYSTAL, DNA
460D
PDB
1
460D
1
12
460D
1
12
460D
A
1
1
12
13
24
460D
13
24
460D
B
1
1
12
BINDING SITE FOR RESIDUE RB B 110
B
RB
110
Software
6
BINDING SITE FOR RESIDUE MG A 25
A
MG
25
Software
6
BINDING SITE FOR RESIDUE MG B 32
B
MG
32
Software
6
BINDING SITE FOR RESIDUE MG B 38
B
MG
38
Software
6
A
TAF
7
A
TAF
7
6
1_555
A
DT
8
A
DT
8
6
1_555
B
TAF
19
B
TAF
7
6
1_555
B
DT
20
B
DT
8
6
1_555
B
HOH
131
H
HOH
6
1_555
B
HOH
145
H
HOH
6
1_555
A
HOH
26
G
HOH
6
1_555
A
HOH
28
G
HOH
6
1_555
B
HOH
27
H
HOH
6
1_555
B
HOH
29
H
HOH
6
1_555
B
HOH
30
H
HOH
6
1_555
B
HOH
31
H
HOH
6
1_555
B
TAF
19
B
TAF
7
6
3_645
B
HOH
33
H
HOH
6
1_555
B
HOH
34
H
HOH
6
1_555
B
HOH
35
H
HOH
6
1_555
B
HOH
36
H
HOH
6
1_555
B
HOH
37
H
HOH
6
1_555
A
HOH
39
G
HOH
6
4_456
A
HOH
40
G
HOH
6
1_555
A
HOH
43
G
HOH
6
1_555
B
HOH
41
H
HOH
6
1_555
B
HOH
42
H
HOH
6
1_555
B
HOH
44
H
HOH
6
1_555
19
orthorhombic
P 21 21 21