On Size and Shape of Proteins

Here the scattering angle parameter s is slightly different from that of h  

The scattered light intensity parameter j s) is calculated from 

The symbol p refers to the density, 5i is the surface dimension, V is the volmne of the molecule, v is the partial specific volume, and Ce is the concentration 

FIGURE 16 Guinier plot for determination of internal structure of protein molecule. 

From S /v, the surface-to-volume ratio, one can calculate the dimension (i.e., the length of the molecule L) using the equation derived by Porod, 

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