Immunogen sequence: WEQSLLEKFS TELNQQLNDL EACVIQEVGV EETPLMNVDS ILAVKKYFQR ITLYLTEKKY SPCAWEVVRA EIMRSFSLSK IFQERLRRKE. Produced by macrophages, IFN-alpha have antiviral activities. Interferon stimulates the production of two enzymes: a protein kinase an