1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
GLU 82 - PHE 83 MODEL 5 OMEGA =211.97 PEPTIDE BOND DEVIATES SIGNIFICANTLY FROM TRANS CONFORMATION
GLU 82 - PHE 83 MODEL 11 OMEGA =210.27 PEPTIDE BOND DEVIATES SIGNIFICANTLY FROM TRANS CONFORMATION
GLU 82 - PHE 83 MODEL 12 OMEGA =210.45 PEPTIDE BOND DEVIATES SIGNIFICANTLY FROM TRANS CONFORMATION
Ullner, M.
Selander, M.
Persson, E.
Stenflo, J.
Drakenberg, T.
Teleman, O.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
1
90.00
90.00
90.00
1.000
1.000
1.000
C3 H7 N O2
89.093
y
ALANINE
L-peptide linking
C6 H15 N4 O2 1
175.209
y
ARGININE
L-peptide linking
C4 H8 N2 O3
132.118
y
ASPARAGINE
L-peptide linking
C4 H7 N O4
133.103
y
ASPARTIC ACID
L-peptide linking
C3 H7 N O2 S
121.158
y
CYSTEINE
L-peptide linking
C5 H10 N2 O3
146.144
y
GLUTAMINE
L-peptide linking
C5 H9 N O4
147.129
y
GLUTAMIC ACID
L-peptide linking
C2 H5 N O2
75.067
y
GLYCINE
peptide linking
C6 H10 N3 O2 1
156.162
y
HISTIDINE
L-peptide linking
C6 H13 N O2
131.173
y
ISOLEUCINE
L-peptide linking
C6 H13 N O2
131.173
y
LEUCINE
L-peptide linking
C6 H15 N2 O2 1
147.195
y
LYSINE
L-peptide linking
H O -1
17.007
HYDROXIDE ION
non-polymer
C9 H11 N O2
165.189
y
PHENYLALANINE
L-peptide linking
C5 H9 N O2
115.130
y
PROLINE
L-peptide linking
C3 H7 N O3
105.093
y
SERINE
L-peptide linking
C4 H9 N O3
119.119
y
THREONINE
L-peptide linking
C9 H11 N O3
181.189
y
TYROSINE
L-peptide linking
US
Biochemistry
BICHAW
0033
0006-2960
31
5974
5983
10.1021/bi00141a004
1627540
Three-dimensional structure of the apo form of the N-terminal EGF-like module of blood coagulation factor X as determined by NMR spectroscopy and simulated folding.
1992
US
Biochemistry
BICHAW
0033
0006-2960
29
8111
1H NMR Assignment and Secondary Structure of the Ca2+-Free Form of the Amino-Terminal Epidermal Growth Factor Like Domain in Coagulation Factor X
1990
US
J.Biol.Chem.
JBCHA3
0071
0021-9258
264
16897
Calcium Binding to the Isolated Beta-Hydroxyaspartic Acid-Containing Epidermal Growth Factor-Like Domain of Bovine Factor X
1989
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
4560.949
EGF-LIKE MODULE OF BLOOD COAGULATION FACTOR X
1
man
polymer
17.007
HYDROXIDE ION
1
syn
non-polymer
no
no
KDGDQCEGHPCLNQGHCKDGIGDYTCTCAEGFEGKNCEFSTR
KDGDQCEGHPCLNQGHCKDGIGDYTCTCAEGFEGKNCEFSTR
A
polypeptide(L)
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
cattle
Bos
sample
9913
Bos taurus
pdbx_database_status
pdbx_struct_assembly
pdbx_struct_oper_list
struct_conf
repository
Initial release
Version format compliance
Version format compliance
Derived calculations
Other
1
0
1994-01-31
1
1
2008-03-24
1
2
2011-07-13
1
3
2017-11-29
_pdbx_database_status.process_site
Y
BNL
1992-04-21
REL
OH
HYDROXIDE ION
13
OH
63
2
OH
OH
87
A
LYS
45
n
1
LYS
45
A
ASP
46
n
2
ASP
46
A
GLY
47
n
3
GLY
47
A
ASP
48
n
4
ASP
48
A
GLN
49
n
5
GLN
49
A
CYS
50
n
6
CYS
50
A
GLU
51
n
7
GLU
51
A
GLY
52
n
8
GLY
52
A
HIS
53
n
9
HIS
53
A
PRO
54
n
10
PRO
54
A
CYS
55
n
11
CYS
55
A
LEU
56
n
12
LEU
56
A
ASN
57
n
13
ASN
57
A
GLN
58
n
14
GLN
58
A
GLY
59
n
15
GLY
59
A
HIS
60
n
16
HIS
60
A
CYS
61
n
17
CYS
61
A
LYS
62
n
18
LYS
62
A
ASP
63
n
19
ASP
63
A
GLY
64
n
20
GLY
64
A
ILE
65
n
21
ILE
65
A
GLY
66
n
22
GLY
66
A
ASP
67
n
23
ASP
67
A
TYR
68
n
24
TYR
68
A
THR
69
n
25
THR
69
A
CYS
70
n
26
CYS
70
A
THR
71
n
27
THR
71
A
CYS
72
n
28
CYS
72
A
ALA
73
n
29
ALA
73
A
GLU
74
n
30
GLU
74
A
GLY
75
n
31
GLY
75
A
PHE
76
n
32
PHE
76
A
GLU
77
n
33
GLU
77
A
GLY
78
n
34
GLY
78
A
LYS
79
n
35
LYS
79
A
ASN
80
n
36
ASN
80
A
CYS
81
n
37
CYS
81
A
GLU
82
n
38
GLU
82
A
PHE
83
n
39
PHE
83
A
SER
84
n
40
SER
84
A
THR
85
n
41
THR
85
A
ARG
86
n
42
ARG
86
A
author_defined_assembly
1
monomeric
1.0000000000
0.0000000000
0.0000000000
0.0000000000
1.0000000000
0.0000000000
0.0000000000
0.0000000000
1.0000000000
1_555
identity operation
0.0000000000
0.0000000000
0.0000000000
1
A
A
HG3
HE1
GLU
PHE
77
83
0.92
1
A
A
CG
HE1
GLU
PHE
77
83
1.19
1
A
A
HG3
CE1
GLU
PHE
77
83
1.20
1
A
A
CB
HE1
GLU
PHE
77
83
1.52
1
A
A
CG
CE1
GLU
PHE
77
83
2.09
3
A
A
O
H
LEU
GLY
56
59
1.56
5
A
A
HG3
HE1
GLU
PHE
77
83
1.23
5
A
A
O
N
GLU
GLU
77
82
2.13
9
A
A
O
O
LYS
OH
62
87
2.19
10
A
A
HG3
HE1
GLU
PHE
77
83
1.03
10
A
A
CG
HE1
GLU
PHE
77
83
1.47
10
A
A
HG3
CE1
GLU
PHE
77
83
1.50
10
A
A
H
O
GLU
PHE
77
83
1.58
11
A
A
HG3
HE1
GLU
PHE
77
83
1.04
11
A
A
CG
HE1
GLU
PHE
77
83
1.37
11
A
A
HG3
CE1
GLU
PHE
77
83
1.44
12
A
A
HG3
HE1
GLU
PHE
77
83
0.91
12
A
A
CG
HE1
GLU
PHE
77
83
1.27
12
A
A
HG3
CE1
GLU
PHE
77
83
1.30
12
A
A
O
N
ASP
CYS
48
50
2.17
12
A
A
CG
CE1
GLU
PHE
77
83
2.18
1
A
LYS
45
10.17
4
A
LYS
45
10.05
5
A
A
GLU
PHE
82
83
-148.03
11
A
A
GLU
PHE
82
83
-149.73
12
A
A
GLU
PHE
82
83
-149.55
1
A
HIS
53
0.138
SIDE CHAIN
1
A
HIS
60
0.176
SIDE CHAIN
1
A
TYR
68
0.090
SIDE CHAIN
1
A
PHE
83
0.325
SIDE CHAIN
2
A
HIS
53
0.155
SIDE CHAIN
2
A
HIS
60
0.107
SIDE CHAIN
2
A
TYR
68
0.109
SIDE CHAIN
3
A
HIS
53
0.124
SIDE CHAIN
3
A
HIS
60
0.178
SIDE CHAIN
3
A
TYR
68
0.132
SIDE CHAIN
4
A
HIS
53
0.162
SIDE CHAIN
4
A
HIS
60
0.170
SIDE CHAIN
4
A
TYR
68
0.108
SIDE CHAIN
5
A
HIS
53
0.166
SIDE CHAIN
5
A
HIS
60
0.158
SIDE CHAIN
5
A
TYR
68
0.107
SIDE CHAIN
5
A
PHE
83
0.320
SIDE CHAIN
6
A
HIS
53
0.158
SIDE CHAIN
6
A
HIS
60
0.177
SIDE CHAIN
6
A
TYR
68
0.075
SIDE CHAIN
7
A
HIS
53
0.154
SIDE CHAIN
7
A
HIS
60
0.152
SIDE CHAIN
7
A
TYR
68
0.098
SIDE CHAIN
8
A
HIS
53
0.159
SIDE CHAIN
8
A
HIS
60
0.157
SIDE CHAIN
8
A
TYR
68
0.109
SIDE CHAIN
9
A
HIS
53
0.174
SIDE CHAIN
9
A
HIS
60
0.157
SIDE CHAIN
9
A
TYR
68
0.112
SIDE CHAIN
10
A
HIS
53
0.172
SIDE CHAIN
10
A
HIS
60
0.165
SIDE CHAIN
10
A
TYR
68
0.110
SIDE CHAIN
10
A
PHE
76
0.078
SIDE CHAIN
10
A
PHE
83
0.300
SIDE CHAIN
11
A
HIS
53
0.160
SIDE CHAIN
11
A
HIS
60
0.140
SIDE CHAIN
11
A
TYR
68
0.062
SIDE CHAIN
11
A
PHE
83
0.316
SIDE CHAIN
12
A
HIS
53
0.166
SIDE CHAIN
12
A
HIS
60
0.165
SIDE CHAIN
12
A
TYR
68
0.086
SIDE CHAIN
12
A
PHE
83
0.320
SIDE CHAIN
13
A
HIS
53
0.156
SIDE CHAIN
13
A
HIS
60
0.157
SIDE CHAIN
13
A
TYR
68
0.143
SIDE CHAIN
1
8.57
1.40
108.80
117.37
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
53
53
53
N
1
8.81
1.40
108.80
117.61
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
60
60
60
N
1
5.60
0.70
120.80
126.40
A
A
A
CB
CG
CD2
PHE
PHE
PHE
83
83
83
N
1
-14.02
0.70
120.80
106.78
A
A
A
CB
CG
CD1
PHE
PHE
PHE
83
83
83
N
2
8.55
1.40
108.80
117.35
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
53
53
53
N
2
9.65
1.40
108.80
118.45
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
60
60
60
N
3
9.09
1.40
108.80
117.89
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
53
53
53
N
3
-8.97
1.30
121.40
112.43
A
A
A
CB
CG
ND1
HIS
HIS
HIS
60
60
60
N
3
-3.77
0.50
120.30
116.53
A
A
A
NE
CZ
NH2
ARG
ARG
ARG
86
86
86
N
4
8.78
1.40
108.80
117.58
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
53
53
53
N
5
8.60
1.40
108.80
117.40
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
53
53
53
N
5
-9.36
1.30
121.40
112.04
A
A
A
CB
CG
ND1
HIS
HIS
HIS
53
53
53
N
5
-7.88
1.30
121.40
113.52
A
A
A
CB
CG
ND1
HIS
HIS
HIS
60
60
60
N
5
6.13
0.70
120.80
126.93
A
A
A
CB
CG
CD2
PHE
PHE
PHE
83
83
83
N
5
-14.20
0.70
120.80
106.60
A
A
A
CB
CG
CD1
PHE
PHE
PHE
83
83
83
N
6
9.81
1.40
108.80
118.61
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
53
53
53
N
6
-7.98
1.30
121.40
113.42
A
A
A
CB
CG
ND1
HIS
HIS
HIS
53
53
53
N
6
8.76
1.40
108.80
117.56
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
60
60
60
N
7
8.44
1.40
108.80
117.24
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
53
53
53
N
7
8.78
1.40
108.80
117.58
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
60
60
60
N
8
9.46
1.40
108.80
118.26
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
53
53
53
N
8
-8.71
1.40
123.60
114.89
A
A
A
CD
NE
CZ
ARG
ARG
ARG
86
86
86
N
8
6.22
0.50
120.30
126.52
A
A
A
NE
CZ
NH1
ARG
ARG
ARG
86
86
86
N
9
-8.13
1.30
121.40
113.27
A
A
A
CB
CG
ND1
HIS
HIS
HIS
53
53
53
N
9
9.17
1.40
108.80
117.97
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
60
60
60
N
10
8.54
1.40
108.80
117.34
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
53
53
53
N
10
8.80
1.40
108.80
117.60
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
60
60
60
N
10
6.28
0.70
120.80
127.08
A
A
A
CB
CG
CD2
PHE
PHE
PHE
83
83
83
N
10
-16.15
0.70
120.80
104.65
A
A
A
CB
CG
CD1
PHE
PHE
PHE
83
83
83
N
10
-3.68
0.50
120.30
116.62
A
A
A
NE
CZ
NH2
ARG
ARG
ARG
86
86
86
N
11
9.12
1.40
108.80
117.92
A
A
A
ND1
CG
CD2
HIS
HIS
HIS
60
60
60
N
11
4.81
0.70
120.80
125.61
A
A
A
CB
CG
CD2
PHE
PHE
PHE
83
83
83
N
11
-14.01
0.70
120.80
106.79
A
A
A
CB
CG
CD1
PHE
PHE
PHE
83
83
83
N
12
-13.72
0.70
120.80
107.08
A
A
A
CB
CG
CD1
PHE
PHE
PHE
83
83
83
N
13
-5.55
0.90
118.30
112.75
A
A
A
CB
CG
OD2
ASP
ASP
ASP
46
46
46
N
13
-6.86
1.10
119.40
112.54
A
A
A
NH1
CZ
NH2
ARG
ARG
ARG
86
86
86
N
13
3.51
0.50
120.30
123.81
A
A
A
NE
CZ
NH1
ARG
ARG
ARG
86
86
86
N
13
3.26
0.50
120.30
123.56
A
A
A
NE
CZ
NH2
ARG
ARG
ARG
86
86
86
N
1
A
A
CB
CG
PHE
PHE
83
83
-0.113
0.017
1.509
1.396
N
1
A
A
CG
CD1
PHE
PHE
83
83
-0.168
0.015
1.383
1.215
N
2
A
A
CG
ND1
HIS
HIS
53
53
-0.094
0.015
1.369
1.275
N
2
A
A
CG
ND1
HIS
HIS
60
60
-0.094
0.015
1.369
1.275
N
3
A
A
CG
ND1
HIS
HIS
53
53
-0.123
0.015
1.369
1.246
N
3
A
A
CG
ND1
HIS
HIS
60
60
-0.099
0.015
1.369
1.270
N
4
A
A
CG
ND1
HIS
HIS
53
53
-0.096
0.015
1.369
1.273
N
4
A
A
CG
ND1
HIS
HIS
60
60
-0.114
0.015
1.369
1.255
N
5
A
A
CG
ND1
HIS
HIS
60
60
-0.097
0.015
1.369
1.272
N
5
A
A
CG
CD1
PHE
PHE
83
83
-0.171
0.015
1.383
1.212
N
6
A
A
CG
ND1
HIS
HIS
53
53
-0.103
0.015
1.369
1.266
N
6
A
A
CG
ND1
HIS
HIS
60
60
-0.096
0.015
1.369
1.273
N
7
A
A
CG
ND1
HIS
HIS
53
53
-0.103
0.015
1.369
1.266
N
7
A
A
CG
ND1
HIS
HIS
60
60
-0.100
0.015
1.369
1.269
N
7
A
A
CD
OE2
GLU
GLU
82
82
-0.070
0.011
1.252
1.182
N
8
A
A
CG
ND1
HIS
HIS
53
53
-0.098
0.015
1.369
1.271
N
8
A
A
CG
ND1
HIS
HIS
60
60
-0.105
0.015
1.369
1.264
N
9
A
A
CG
ND1
HIS
HIS
53
53
-0.107
0.015
1.369
1.262
N
10
A
A
CG
ND1
HIS
HIS
53
53
-0.099
0.015
1.369
1.270
N
10
A
A
CB
CG
PHE
PHE
83
83
-0.133
0.017
1.509
1.376
N
10
A
A
CG
CD1
PHE
PHE
83
83
-0.227
0.015
1.383
1.156
N
11
A
A
N
CA
GLY
GLY
47
47
-0.100
0.015
1.456
1.356
N
11
A
A
CG
ND1
HIS
HIS
53
53
-0.105
0.015
1.369
1.264
N
11
A
A
CG
ND1
HIS
HIS
60
60
-0.112
0.015
1.369
1.257
N
11
A
A
CB
CG
PHE
PHE
83
83
-0.125
0.017
1.509
1.384
N
11
A
A
CG
CD1
PHE
PHE
83
83
-0.191
0.015
1.383
1.192
N
12
A
A
CG
ND1
HIS
HIS
53
53
-0.093
0.015
1.369
1.276
N
12
A
A
CG
ND1
HIS
HIS
60
60
-0.091
0.015
1.369
1.278
N
12
A
A
CG
CD1
PHE
PHE
83
83
-0.189
0.015
1.383
1.194
N
13
A
A
CG
ND1
HIS
HIS
53
53
-0.093
0.015
1.369
1.276
N
13
A
A
NE
CZ
ARG
ARG
86
86
-0.107
0.013
1.326
1.219
N
1
A
GLN
49
46.53
7.05
1
A
HIS
53
9.25
91.99
1
A
GLN
58
46.83
26.86
1
A
LYS
62
-90.00
-141.60
1
A
ILE
65
-88.76
30.08
1
A
ASP
67
73.81
137.21
1
A
TYR
68
-78.25
-165.16
1
A
GLU
77
-155.03
-146.31
2
A
ASP
48
-97.15
52.56
2
A
CYS
50
-143.22
19.88
2
A
HIS
53
51.29
90.33
2
A
GLN
58
49.73
29.20
2
A
TYR
68
-77.40
-166.19
2
A
CYS
81
86.48
18.67
2
A
THR
85
43.87
19.95
3
A
ASP
48
-110.64
58.73
3
A
HIS
53
10.61
92.63
3
A
CYS
81
82.51
17.44
4
A
HIS
53
-173.12
96.67
4
A
LYS
62
-123.30
-144.35
4
A
ASP
67
-176.58
141.14
5
A
HIS
53
-172.30
94.48
5
A
GLU
77
-155.84
-146.72
5
A
THR
85
37.14
28.55
6
A
GLN
49
42.21
6.78
6
A
HIS
53
44.48
84.20
6
A
ILE
65
36.27
36.49
6
A
ASP
67
67.57
116.78
6
A
TYR
68
-76.70
-169.90
6
A
THR
85
40.03
20.87
7
A
HIS
53
13.98
88.47
7
A
THR
85
46.10
22.95
8
A
GLN
49
43.29
4.91
8
A
CYS
50
-112.53
54.97
8
A
GLU
51
-40.61
163.93
8
A
HIS
53
-174.26
93.03
8
A
LYS
62
-103.29
-132.75
8
A
THR
85
44.29
16.15
9
A
ASP
48
-166.43
29.73
9
A
CYS
50
-163.87
14.32
9
A
HIS
53
39.65
91.50
9
A
ASP
63
63.22
146.28
9
A
ALA
73
115.88
162.28
9
A
CYS
81
94.10
26.94
9
A
THR
85
47.54
5.33
10
A
ASP
48
-119.44
66.67
10
A
CYS
50
-145.23
-22.75
10
A
HIS
53
44.30
82.18
10
A
ASP
67
68.08
153.51
10
A
GLU
77
-143.20
-145.86
10
A
THR
85
-178.29
-49.08
11
A
ASP
46
-100.20
-65.56
11
A
HIS
53
50.52
86.13
11
A
TYR
68
-78.56
-164.71
11
A
GLU
77
-154.73
-151.95
12
A
GLN
49
41.99
6.58
12
A
HIS
53
48.08
90.74
12
A
GLU
74
-50.62
109.85
12
A
GLU
77
-157.15
-145.52
13
A
ASP
48
-96.09
39.26
13
A
CYS
50
-154.69
23.07
13
A
HIS
53
49.84
83.12
13
A
ASP
67
73.13
134.62
13
A
ALA
73
119.75
165.29
13
A
CYS
81
92.18
27.25
EGF-LIKE MODULE OF BLOOD COAGULATION FACTOR X (N-TERMINAL, APO FORM) (NMR, 13 STRUCTURES)
THREE-DIMENSIONAL STRUCTURE OF THE APO FORM OF THE N-TERMINAL EGF-LIKE MODULE OF BLOOD COAGULATION FACTOR X AS DETERMINED BY NMR SPECTROSCOPY AND SIMULATED FOLDING
1
Y
N
2
N
N
disulf
2.383
A
CYS
50
A
SG
CYS
6
1_555
A
CYS
61
A
SG
CYS
17
1_555
disulf
2.379
A
CYS
55
A
SG
CYS
11
1_555
A
CYS
70
A
SG
CYS
26
1_555
disulf
2.501
A
CYS
72
A
SG
CYS
28
1_555
A
CYS
81
A
SG
CYS
37
1_555
covale
1.458
A
ASP
63
A
CB
ASP
19
1_555
A
OH
87
B
O
OH
1_555
COAGULATION FACTOR
COAGULATION FACTOR
FA10_BOVIN
UNP
1
1
P00743
MAGLLHLVLLSTALGGLLRPAGSVFLPRDQAHRVLQRARRANSFLEEVKQGNLERECLEEACSLEEAREVFEDAEQTDEF
WSKYKDGDQCEGHPCLNQGHCKDGIGDYTCTCAEGFEGKNCEFSTREICSLDNGGCDQFCREERSEVRCSCAHGYVLGDD
SKSCVSTERFPCGKFTQGRSRRWAIHTSEDALDASELEHYDPADLSPTESSLDLLGLNRTEPSAGEDGSQVVRIVGGRDC
AEGECPWQALLVNEENEGFCGGTILNEFYVLTAAHCLHQAKRFTVRVGDRNTEQEEGNEMAHEVEMTVKHSRFVKETYDF
DIAVLRLKTPIRFRRNVAPACLPEKDWAEATLMTQKTGIVSGFGRTHEKGRLSSTLKMLEVPYVDRSTCKLSSSFTITPN
MFCAGYDTQPEDACQGDSGGPHVTRFKDTYFVTGIVSWGEGCARKGKFGVYTKVSNFLKWIDKIMKARAGAAGSRGHSEA
PATWTVPPPLPL
85
126
1APO
45
86
P00743
A
1
1
42
2
2
anti-parallel
anti-parallel
A
GLY
59
A
GLY
15
A
ASP
63
A
ASP
19
A
TYR
68
A
TYR
24
A
CYS
72
A
CYS
28
A
PHE
76
A
PHE
32
A
GLU
77
A
GLU
33
A
PHE
83
A
PHE
39
A
SER
84
A
SER
40
BINDING SITE FOR RESIDUE OH A 87
Software
2
A
ASP
63
A
ASP
19
2
1_555
A
GLY
64
A
GLY
20
2
1_555
1
P 1