Data Item _chem_link_bond.atom_id_1
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General 
- Item name
- _chem_link_bond.atom_id_1
- Category name
- chem_link_bond
- Attribute name
- atom_id_1
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The ID of the first of the two atoms that define the bond.
As this data item does not point to a specific atom in a
specific chemical component, it is not a child in the
linkage sense.
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*|+-]*
