Data Item _geom_bond.atom_site_id_1
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General 
- Item name
- _geom_bond.atom_site_id_1
- Category name
- geom_bond
- Attribute name
- atom_site_id_1
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The identifier of the first of the two atom sites that define the
bond.
This data item is a pointer to _atom_site.id in the ATOM_SITE
category.
Data Type 
- Data type code
- code
- Data type detail
- code item types/single words ...
- Primitive data type code
- char
- Regular expression
- [][_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
Parent Data Items 
Dependent Items 
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _geom_bond_atom_site_label_1 | cif_core.dic | 2.0.1 |