Data Item _chem_comp_chir.volume_three
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General 
- Item name
- _chem_comp_chir.volume_three
- Category name
- chem_comp_chir
- Attribute name
- volume_three
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
The chiral volume, Vc, for chiral centres that involve a chiral
atom bonded to three non-hydrogen atoms and one hydrogen atom.
Vc = V1 * (V2 X V3)
V1 = the vector distance from the atom specified by
_chem_comp_chir.atom_id to the first atom in the
CHEM_COMP_CHIR_ATOM list
V2 = the vector distance from the atom specified by
_chem_comp_chir.atom_id to the second atom in the
CHEM_COMP_CHIR_ATOM list
V3 = the vector distance from the atom specified by
_chem_comp_chir.atom_id to the third atom in the
CHEM_COMP_CHIR_ATOM list
* = the vector dot product
X = the vector cross product
Data Type 
- Data type code
- float
- Data type detail
- float item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?
- Units
- angstroms_cubed
Related Items 
| Related Item Name | Relation Type |
|---|---|
| _chem_comp_chir.volume_three_esd | associated_esd |