Data Item _struct_sheet.number_strands
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General 
- Item name
- _struct_sheet.number_strands
- Category name
- struct_sheet
- Attribute name
- number_strands
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 87.5 % of entries
Item Description
The number of strands in the sheet. If a given range of residues
bulges out from the strands, it is still counted as one strand.
If a strand is composed of two different regions of polypeptide,
it is still counted as one strand, as long as the proper hydrogen-
bonding connections are made to adjacent strands.
Data Type 
- Data type code
- int
- Data type detail
- int item types are the subset of numbers that are the negative or positive integers.
- Primitive data type code
- numb
- Regular expression
- [+-]?[0-9]+