Data Item _entity_keywords.text
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General 
- Item name
- _entity_keywords.text
- Category name
- entity_keywords
- Attribute name
- text
- Required in PDB entries
- Used in current PDB entries
- Yes, in about 0.10 % of entries
Item Description
Keywords describing this entity.
Additional Descriptive Information for Depositors
Keywords describing the essential nature of the crystalized molecular entity. These keywords should not describe structural features. Separate multiple keywords by commmas.
Item Example1
polypeptide
Item Example2
natural product
Item Example3
polysaccharide
Additional Item Example for Depositors1
natural product
Additional Item Example for Depositors2
polypeptide
Additional Item Example for Depositors3
oligosaccharide
Data Type 
- Data type code
- text
- Data type detail
- text item types / multi-line text ...
- Primitive data type code
- char
- Regular expression
- [][ \n\t()_,.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*