Data Item _em_helical_selection.num_unit_cells
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General 
- Item name
- _em_helical_selection.num_unit_cells
- Category name
- em_helical_selection
- Attribute name
- num_unit_cells
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
The numeber of unit cells or asymmetric units
used to refine the repeat parameters
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]+