Data Item _atom_site.U_iso_or_equiv_esd
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General 
- Item name
- _atom_site.U_iso_or_equiv_esd
- Category name
- atom_site
- Attribute name
- U_iso_or_equiv_esd
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
The standard uncertainty (estimated standard deviation)
of _atom_site.U_iso_or_equiv.
Data Type 
- Data type code
- float
- Data type detail
- float item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?
- Units
- angstroms_squared
Related Items 
| Related Item Name | Relation Type |
|---|---|
| _atom_site.U_iso_or_equiv | associated_value |
| _atom_site.B_iso_or_equiv_esd | conversion_constant |