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
is bulged 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, so 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]+