Data Item _refine.solvent_model_param_ksol
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General 
- Item name
- _refine.solvent_model_param_ksol
- Category name
- refine
- Attribute name
- solvent_model_param_ksol
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 10.4 % of entries
Item Description
The value of the KSOL solvent-model parameter describing
the ratio of the electron density in the bulk solvent to the
electron density in the molecular solute.
This is one of the two parameters (the other is
_refine.solvent_model_param_bsol) in Tronrud's method of
modelling the contribution of bulk solvent to the
scattering. The standard scale factor is modified according
to the expression
k0 exp(-B0 * s2)[1-KSOL * exp(-BSOL * s2)]
where k0 and B0 are the scale factors for the protein.
Ref: Tronrud, D. E. (1997). Methods Enzymol. 277, 243-268.
Additional Descriptive Information for Depositors
The value of the KSOL solvent-model parameter describing the ratio of the electron density in the bulk solvent to the electron density in the molecular solute
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]+)?
Advisory Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0.1 | 1 |