| Species | Count |
| Anopheles gambiae |
2 |
| Aquifex aeolicus vf5 |
1 |
| Arabidopsis thaliana |
2 |
| Ashbya gossypii |
1 |
| Aspergillus nidulans |
1 |
| Bacillus subtilis |
1 |
| Bacteroides thetaiotaomicron |
1 |
| Bos taurus |
2 |
| Bradyrhizobium japonicum |
2 |
| Caenorhabditis briggsae |
2 |
| Caenorhabditis elegans |
2 |
| Canis familiaris |
2 |
| Chlamydia trachomatis |
1 |
| Chlamydomonas reinhardtii |
1 |
| Chloroflexus aurantiacus |
1 |
| Ciona intestinalis |
1 |
| Danio rerio |
3 |
| Deinococcus radiodurans |
1 |
| Dictyostelium discoideum |
2 |
| Drosophila melanogaster |
2 |
| Entamoeba histolytica |
1 |
| Escherichia coli |
1 |
| Fugu rubripes |
2 |
| Gallus gallus |
2 |
| Geobacter sufurreducens |
1 |
| Gloeobacter violaceus |
1 |
| Homo sapiens |
2 |
| Leishmania major |
1 |
| Leptospira interrogans |
1 |
| Macaca mulatta |
2 |
| Methanosarcina acetivorans c2a |
1 |
| Monodelphis domestica |
3 |
| Mus musculus |
2 |
| Neurospora crassa |
1 |
| Ornithorhynchus anatinus |
2 |
| Oryza sativa |
2 |
| Pan troglodytes |
2 |
| Plasmodium yoelii yoelii |
3 |
| Pseudomonas aeruginosa |
1 |
| Rattus norvegicus |
1 |
| Saccharomyces cerevisiae |
2 |
| Schizosaccharomyces pombe |
1 |
| Streptomyces coelicolor |
2 |
| Strongylocentrotus purpuratus |
4 |
| Sulfolobus solfataricus p2 |
1 |
| Tetrahymena thermophila |
1 |
| Thermotoga maritima |
1 |
| Xenopus tropicalis |
3 |
catalytic activity
ligase activity
