Data Item _em_helical_entity.axial_symmetry
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General 
- Item name
- _em_helical_entity.axial_symmetry
- Category name
- em_helical_entity
- Attribute name
- axial_symmetry
- Required in PDB entries
- yes
- Used in current PDB entries
- Yes, in about 0.3 % of entries
Item Description
Symmetry of the helical axis, either cyclic (Cn) or dihedral (Dn), where n>=1.
Item Example1
C1
Item Example2
D2
Item Example3
C7
Data Type 
- Data type code
- point_group_helical
- Data type detail
- Point group symmetry for helices in Schoenflies notation
- Primitive data type code
- char
- Regular expression
- [CD][1-9][0-9]*
Related Items 
| Related Item Name | Relation Type |
|---|---|
| _em_helical_entity.dyad | replaces |