Studies on precursors of hemolytic plaque-forming cells: Effect of the specific removal of natural PFC by erythrocyte-conjugated Sepharose beads on the responsiveness of depleted spleen cells

Influenza virus particles, inactivated with formalin, have been covalently bound to cyanogen bromide-activated Sepharose beads (Se-vi beads). Preservation of the hemagglutination properties of the viral particles enabled a strong binding of pigeon or human group O erythrocytes (PRBC or HoRBC) to the...

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