Data Item _ndb_struct_na_base_pair_step.roll
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General 
- Item name
- _ndb_struct_na_base_pair_step.roll
- Category name
- ndb_struct_na_base_pair_step
- Attribute name
- roll
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 6.5 % of entries
Item Description
The value of the base pair step roll parameter.
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]+)?