the function of the factor to activate macrophages was destroyed by treatment with a small amount of anti-interferon ( ifn ) -gamma antiserum or under acidic conditions ( ph 2 ) , but not by treatment with anti-ifn-alpha/beta antiserum , while the anti-viral activity was destroyed almost completely by treatment with anti-ifn-alpha/beta antiserum .
C0024432
macrophages
C0015980
ifn