in human fibroblasts , expression of mxa and mxb is strongly induced by alpha interferon ( ifn-alpha ) , ifn-beta , newcastle disease virus , and , to a much lesser extent , ifn-gamma , mxa and mxb proteins have molecular masses of 76 and 73 kilodaltons , respectively , and their sequences are 63 % identical .
C0016030
fibroblasts
C0015980
ifn-beta