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
- yes
- Used in currrent PDB entries
- No
- 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
- line
- Data type detail
- char item types / multi-word items ...
- Primitive data type code
- char
- Regular expression
- [][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| AROM | aromatic bond |
| DELO | delocalized double bond |
| DIRECTED | N ->O |
| 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 |
| DIRECTED | N ->O |
| DOUB | double bond |
| PI | pi bond |
| POLY | polymeric bond |
| QUAD | quadruple bond |
| SING | single bond |
| TRIP | triple bond |