Virosome - an overview | ScienceDirect Topics www.sciencedirect.com/topics/medicine-and... virosomes consisting of influenza HA and NA, influenza envelope phospholipids, egg PC, PE and succinimidyl-4-(p-male-imidophenyl) butyrate (SMPB) (crosslinker molecule for covalent binding of the HAV antigen); https://www.sciencedirect.com/topics/medicine-and-dentistry/virosome