IRF-2 is a mammalian transcription factor for interferon and interferon inducible genes of having oncogenic activity under certain circumstances.We compared the amino acid sequences of mouse IRF-2 (349 amino acid) with human IRF-2 and found a C-terminal tetra-peptide (314PAPV317) of mouse IRF-2 to be different from (314SSSM317) human IRF-2 (349 amino acid). The murine IRF-2 sequence (PAPV) at 314-317 was replaced by SSSM, the corresponding region of the human IRF-2, by site-directed cassette mutagenesis. Both the wild type and mutant IRF-2 were prepared as GST-fusion proteins expressed in E....