Data Item _bond.value_order
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General 
- Item name
- _bond.value_order
- Category name
- bond
- Attribute name
- value_order
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The order of the bond between two atoms (i.e., single, double, etc.)
Item Example
SING
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 |