Interaction of liposomes with subviral particles of poliovirus type 2 and rhinovirus type 2.

Subviral particles ("A particles") were produced from rhinovirus type 2 by treatment with acid and from poliovirus type 2 by incubation at 37 degrees C in a low-ionic-strength buffer. A particles, but not virions, adsorbed to liposomes. It is proposed that these reactions may provide an in vitro model for two early steps of infection.