Services
Research
Training
Industry
About us
Protein Data Bank
in Europe
Bringing Structure to Biology
Chemical Components in the PDB
pdbe.org/chem
Feedback
Share
Summary
Atoms
Bonds
In PDB Entries
Names
Descriptors
Complete Listing
Modify Search
Download Links
Molfile:
Ideal
Representative
PDB:
Ideal
Representative
Other:
mmCif
CML
Related compounds
Could not find any related compound in the PDB.
3D-Views
Ideal
Representative
PDB Links
PDB entries
PDBeChem : Chemical Bonds
Molecule :
1UN
Bonds between two atoms of the molecule
Total Number of Bonds: 88
50
10 per page
20 per page
Show all
Record
First Atom
Second Atom
First Element
Second Element
Bond Order Type
Bond Length
Bond Stereochemistry
Is Aromatic
1
C1
C2
C
C
sing
1.53
N
N
2
C1
C6
C
C
sing
1.53
N
N
3
C1
C10
C
C
sing
1.53
N
N
4
C1
H1
C
H
sing
1.09
N
N
5
C2
C3
C
C
sing
1.53
N
N
6
C2
C9
C
C
sing
1.53
N
N
7
C2
H2
C
H
sing
1.09
N
N
8
C3
C4
C
C
sing
1.53
N
N
9
C3
H31A
C
H
sing
1.09
N
N
10
C3
H32A
C
H
sing
1.09
N
N
11
C4
C5
C
C
sing
1.53
N
N
12
C4
H41
C
H
sing
1.09
N
N
13
C4
H42
C
H
sing
1.09
N
N
14
C5
C6
C
C
sing
1.53
N
N
15
C5
H51
C
H
sing
1.09
N
N
16
C5
H52
C
H
sing
1.09
N
N
17
C6
H61
C
H
sing
1.09
N
N
18
C6
H62
C
H
sing
1.09
N
N
19
N7
C8
N
C
sing
1.47
N
N
20
N7
C10
N
C
sing
1.47
N
N
21
N7
C18
N
C
sing
1.47
N
N
22
C8
C9
C
C
sing
1.51
N
N
23
C8
C11
C
C
sing
1.51
N
N
24
C8
H8
C
H
sing
1.09
N
N
25
C9
H91
C
H
sing
1.09
N
N
26
C9
H92
C
H
sing
1.09
N
N
27
C10
H101
C
H
sing
1.09
N
N
28
C10
H102
C
H
sing
1.09
N
N
29
C11
N12
C
N
sing
1.35
N
N
30
C11
O17
C
O
doub
1.21
N
N
31
N12
C13
N
C
sing
1.46
N
N
32
N12
HNC
N
H
sing
0.97
N
N
33
C13
C14
C
C
sing
1.53
N
N
34
C13
C15
C
C
sing
1.53
N
N
35
C13
C16
C
C
sing
1.53
N
N
36
C14
H141
C
H
sing
1.09
N
N
37
C14
H142
C
H
sing
1.09
N
N
38
C14
H143
C
H
sing
1.09
N
N
39
C15
H151
C
H
sing
1.09
N
N
40
C15
H152
C
H
sing
1.09
N
N
41
C15
H153
C
H
sing
1.09
N
N
42
C16
H161
C
H
sing
1.09
N
N
43
C16
H162
C
H
sing
1.09
N
N
44
C16
H163
C
H
sing
1.09
N
N
45
C18
C19
C
C
sing
1.53
N
N
46
C18
H181
C
H
sing
1.09
N
N
47
C18
H182
C
H
sing
1.09
N
N
48
C19
C20
C
C
sing
1.53
N
N
49
C19
O21
C
O
sing
1.43
N
N
50
C19
H19
C
H
sing
1.09
N
N
51
C20
N22
C
N
sing
1.46
N
N
52
C20
C23
C
C
sing
1.53
N
N
53
C20
H20
C
H
sing
1.09
N
N
54
O21
HOL
O
H
sing
0.97
N
N
55
N22
C24
N
C
sing
1.35
N
N
56
N22
HNM
N
H
sing
0.97
N
N
57
C23
S74
C
S
sing
1.81
N
N
58
C23
H231
C
H
sing
1.09
N
N
59
C23
H232
C
H
sing
1.09
N
N
60
C24
O25
C
O
doub
1.22
N
N
61
C24
C29
C
C
sing
1.48
N
N
62
C29
C30
C
C
doub
1.39
N
Y
63
C29
C34
C
C
sing
1.39
N
Y
64
C30
C31
C
C
sing
1.38
N
Y
65
C30
H30
C
H
sing
1.08
N
N
66
C31
C32
C
C
doub
1.38
N
Y
67
C31
H31
C
H
sing
1.08
N
N
68
C32
C33
C
C
sing
1.39
N
Y
69
C32
H32
C
H
sing
1.08
N
N
70
C33
C34
C
C
doub
1.39
N
Y
71
C33
O38
C
O
sing
1.36
N
N
72
C34
C39
C
C
sing
1.51
N
N
73
O38
HO
O
H
sing
0.97
N
N
74
C39
H391
C
H
sing
1.09
N
N
75
C39
H392
C
H
sing
1.09
N
N
76
C39
H393
C
H
sing
1.09
N
N
77
S74
C77
S
C
sing
1.76
N
N
78
C77
C78
C
C
doub
1.39
N
Y
79
C77
C82
C
C
sing
1.39
N
Y
80
C78
C79
C
C
sing
1.38
N
Y
81
C78
H78
C
H
sing
1.08
N
N
82
C79
C80
C
C
doub
1.38
N
Y
83
C79
H79
C
H
sing
1.08
N
N
84
C80
C81
C
C
sing
1.38
N
Y
85
C80
H80
C
H
sing
1.08
N
N
86
C81
C82
C
C
doub
1.38
N
Y
87
C81
H81
C
H
sing
1.08
N
N
88
C82
H82
C
H
sing
1.08
N
N