natural and leukocyte interferons : alpha ( induced by newcastle disease virus ) and gamma ( induced by staphylococcal enterotoxin a ) as well as natural fibroblastic beta interferon induced by poly ( i ) x poly ( c ) were studied in comparison with plasmid interferons alpha-f and alpha-f/d obtained from recombinant bacteria .
C0015980
natural
C0016030
fibroblastic