Data Item _space_group.IT_number
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General 
- Item name
- _space_group.IT_number
- Category name
- space_group
- Attribute name
- IT_number
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 1.5 % of entries
Item Description
The number as assigned in International Tables for
Crystallography Vol. A, specifying the proper affine class (i.e.
the orientation-preserving affine class) of space groups
(crystallographic space-group type) to which the space group
belongs. This number defines the space-group type but not
the coordinate system in which it is expressed.
Data Type 
- Data type code
- int
- Data type detail
- int item types are the subset of numbers that are the negative or positive integers.
- Primitive data type code
- numb
- Regular expression
- [+-]?[0-9]+
Allowed Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 1 | 230 |
Related Items 
| Related Item Name | Relation Type |
|---|---|
| _symmetry.Int_Tables_number | alternate |
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _space_group_IT_number | cif_core.dic | 2.3 |