Data Item _chem_comp_bond.value_order
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General 
- Item name
- _chem_comp_bond.value_order
- Category name
- chem_comp_bond
- Attribute name
- value_order
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 80.1 % of entries
- Used in the Chemical Component dictionary
- Yes
Item Description
The value that should be taken as the target for the chemical
bond associated with the specified atoms, expressed as a bond
order.
Data Type 
- Data type code
- ucode
- Data type detail
- code item types/single words (case insensitive) ...
- Primitive data type code
- uchar
- Regular expression
- [][_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
- Default value
- sing
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| arom | aromatic bond |
| delo | delocalized double bond |
| doub | double bond |
| pi | pi bond |
| poly | polymeric bond |
| quad | quadruple bond |
| sing | single bond |
| trip | triple bond |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| arom | aromatic bond |
| delo | delocalized double bond |
| doub | double bond |
| pi | pi bond |
| poly | polymeric bond |
| quad | quadruple bond |
| sing | single bond |
| trip | triple bond |