Data Item _em_map.spacing_x
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General 
- Item name
- _em_map.spacing_x
- Category name
- em_map
- Attribute name
- spacing_x
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The number of intervals per cell repeat in X.
(CCP4 map header word 8 NX)
Data Type 
- Data type code
- positive_int
- Data type detail
- Positive integers (1,2,3,..)
- Primitive data type code
- numb
- Regular expression
- [1-9][0-9]*