Data Item _coupling_constant.code
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General 
- Item name
- _coupling_constant.code
- Category name
- coupling_constant
- Attribute name
- code
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
A code that defines the atoms involved in the coupling constant and the
number of bonds between the named atoms. The code is generated on the basis of
the standard nomenclature for coupling constants used in the NMR community.
Data Type 
- Data type code
- line
- Data type detail
- char item types / multi-word items ...
- Primitive data type code
- char
- Regular expression
- [][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*