Precipitin antigen was prepared from cultures infected with V-Z virus. Five separate antigens were identified. Reactions with radiolabeled antigen were detected by autoradiography. Partial purification of antigens could be accomplished in a discontinuous sucrose gradient, yet too little antigen was recovered from DEAE to make this a practicable purification method. Most of the antigenic activity was eluted from G-200 Sephadex. Antigens were identified by their degree of chemical stability. The α antigen was the only one which was stable at pH 3. The β antigen was destroyed by CsCl or DOC. DOC released the γ Δ, and ε antigens from the infectious viral particle.
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Brunell et al. (1972) studied this question.