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Lect. 6 composition & Architecture of plant viruses

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Various feature <strong>of</strong> <strong>viruses</strong> can be<br />

estimated by studying:<br />

• Chemical & biochemical studies<br />

• Size <strong>of</strong> particles<br />

• Hydrodynamics<br />

• Laser scattering has been used to determine the<br />

radii <strong>of</strong> spherical <strong>viruses</strong><br />

• E.M.<br />

• X-ray crystallography<br />

• it gives accurate estimates <strong>of</strong> radius <strong>of</strong> icosahedral<br />

<strong>viruses</strong> but condition is that the virus should be able to<br />

form stable crystals.

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