Phylogenetic trees of the closest eukaryotic homologs of clones AY577333 and AY577329. Phylogenetic trees of the closest eukaryotic homologs of clones AY577333 and AY577329. Trees were generated by the neighbor-joining method using default parameters of the ClustalX program. SE, squalene epoxidase. Note the absence of Drosophila or C. elegans homologs in both cases. Alignments of the sequences comprising these trees are shown in the supplemental material on line. Hanna Jaaro et al. Mol Cell Proteomics 2005;4:328-333 The American Society for Biochemistry and Molecular Biology