We analyzed the occurrences of conserved protein patterns in the intergenic region of yeast, worm, fruitfly and human chromosomes 21 and 22. We found that 67 pseudomotif p atterns are over-represented in the fly genome, and 34, in the worm. Among the over-represented patterns are the well-known Zinc finger, leucine zipper, and nucleotide-bin ding motif. We argue that the enrichment of these patterns in the intergenic region reflects the fact that some of them are remaining fragments of ancient disabled protein -coding genes.

Here is an interactive table, which contains data for all four species: yeast, worm, fruit fly, and human chromosome 21 & 22.