上商充通大￥ Shanghai Jiao Tong University Virus Structure Surface proteins Nucleocapsid Protein shell Nucleic acid Nucleic acid. Lipid layer Membrane (matrix protein) (a) (b) .Virus contains a few proteins,lipids and nucleic acid which are accurately replicated by the infected cell to produce more viruses.Shanghai Jiao Tong University Virus Structure Virus Structure •Virus contains a few proteins, lipids and nucleic acid which are accurately replicated by the infected cell to produce more viruses