Abstract
We have measured the small-angle X-ray scattering from dilute aqueous solutions of southern bean mosaic virus, tobacco necrosis virus, and tomato bushy stunt virus. All of these virus particles are nearly spherical. Values of the sphere diameter obtained by a comparison of our curves with curves of the exact scattering function for spheres are SBMV = 286 A, TNV = 280 A and TBSV = 309 A. A comparison of these values with other molecular constants strongly suggests that they are internally hydrated. The effects upon the experimental curves of interparticle interference and of slit dimensions for the X-ray collimating system are considerable and have been taken into account.
Published Version
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