Data Item _em_map_resolution.cutoff_used
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General 
- Item name
- _em_map_resolution.cutoff_used
- Category name
- em_map_resolution
- Attribute name
- cutoff_used
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
The cutoff value to estimate the resolution value can be defined by:
- the point of the curve where the correlation is 0.5
- the point of the curve that crosses a significance threshold curve
According to Orlova et al. 1997 (J Mol Biol, 271:417) this significance
threshold curve is defined as the 3*sigma (sigma = standard deviation of
the FSC) for non-symmetrical particles. (units: 1/A)
[stc stands for significance threshold curve]
Data Type 
- Data type code
- float
- Data type detail
- int 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]+)?