
Phylogenetic tree of the PPEF subfamily. The unrooted tree was generated from aligned nucleotide sequences by the DNAML program of the PHYLIP software package. Regions of ambiguous alignment were excluded from the analysis. Scale bar, 0.1 expected substitutions per nucleotide site. Bootstrap values were generated from 100 bootstrap replicates of the alignment and are shown. Fugu PPEF-1 and human PPEF-1 cluster in the same branch; human and mouse PPEF-2 cluster in a second branch.











