An Information Portal to Biological Macromolecular Structures
PDB Home |		Dictionary Resources Home  |  Dictionary  |  Category Groups  |  Categories  |  Items  |  Data

Item _refln.ccp4_SAD_HL_C_iso

Description

 The isomorphous Hendrickson-Lattman coefficient C~iso~ for this
   reflection for this derivative.
              -Fp~obs~^2^ * [sin(alphah~calc~)2^
                          -  cos(alphah~calc~)2^]
    C~iso~ =  ------------------------------------
                             E2^
 
    E            = (Fph~obs~ - Fp~obs~ - Fh~calc~)2^
                   for centric reflections
                 = [(Fph~obs~ - Fp~obs~) * 21/2^ - Fh~calc~]^2^
                   for acentric reflections
 
    Fp~obs~      = the observed structure factor amplitude of the
                   native
    Fph~obs~     = the observed structure factor amplitude of the
                   derivative
    Fh~calc~     = the calculated structure factor amplitude
                   from the heavy atom model
    alphah~calc~ = the phase calculated from the heavy atom model

Category

Mandatory Code

Data Type Code

 

© RCSB PDB