Shape, symmetry, hydration and secondary structure of the legumin from Vicia faba in solution.

The following physical parameters of the legumin from Vicia faba were determined by means of small-angle X-ray scattering, quasi-elastic light scattering and circular dichroism: molar mass, M = 3.5 X 10(5) g/mol; radius of gyration, Rg = 4.45 nm; maximum dimension, L = 13 nm; translational diffusion coefficient, D0(20),w = 3.38 X 10(-7) cm2 X s-1; alpha-helix content about 15%; content of beta-sheets 10%; dihedral point group symmetry of the molecule 32.