Similarity and representation pattern of assembled Apis mellifera ESTs (ORESTES + NCBI dbESTs) with predicted proteins of other organisms. In this comparison we included eukaryotes with completely sequenced genomes (Drosophila melanogaster, Anopheles gambiae, Caenorhabditis elegans and human), plus higher taxon groups, such as protozoans (primarily represented by Plasmodium falciparum and P. yoelii) and fungi (primarily represented by Saccharomyces cerevisiae, Schizosaccharomyces pombe and Neurospora crassa). These BLASTX comparisons were performed with an E-value cut-off level set at 10-6. Subsequently, the representation pattern of each of the Apis ESTs in each of the eukaryotic genomes was listed. Out of the total 3,408 Apis EST contigs, 1,629 could be classified as putative orthologs, and these were grouped according to the representation of these genes at the different taxonomic levels.