FIG. 4.

Phylogenetic tree of IFN-γ polypeptides. The dendrogram is based on distance analysis of predicted IFN-γ polypeptide sequences aligned with CLUSTALW. Sequences were obtained from GenBank. The sequences for which data are shown are duck IFN-γ, chicken IFN-γ (accession no. X99774), turkey IFN-γ (AJ000715B), pheasant IFN-γ (AJ001289), quail IFN-γ (AJ001678), guinea fowl IFN-γ (AJ001263), gerbil IFN-γ (L37782), mouse IFN-γ (K00083), rat IFN-γ (AF010466), woodchuck IFN-γ (Y14138), rabbit IFN-γ (AB010386), marmoset IFN-γ (X64659), rhesus macaque IFN-γ (L26024), mangabey IFN-γ (L26025), human IFN-γ (X13274), sheep IFN-γ (X52640), goat IFN-γ (U34232), bovine IFN-γ (Z54144), red deer IFN-γ (X63079), swine IFN-γ (X53085), cat IFN-γ (D30619), and horse IFN-γ (A11777). Dog IFN-γ is described in reference 7.