Fig. 3. Amino acid sequences of IFN-g derived from the human bovine (39), sheep (40), pig (41), mouse (42), and rat (43) cDNA sequences (44). The alpha-helical assignments based on the IFN-g D' structure are noted beneath the residues. The bovine, ovine, and porcine sequences have been truncated at the COOH-terminus to correspond to the recombinant human IFN-g D' sequence. There is a deletion in the mouse sequence corresponding to position 26 in the human sequence.