Purification of togavirus haemagglutinins by chromatography on controlled pore glass.

Purified preparations of haemagglutinins from Sindbis, West Nile and tick-borne encephalitis (TBE) viruses could be obtained from infected mouse brains by alkaline extraction, precipitation with protamine and chromatography on polyethylene glycol-coated controlled pore glass with 242 A pore diameter.