| Recently, large numbers of new retinal proteins were discovered in both prokaryotic and eukaryotic organisms. |
| Selenium is a trace element and is found as a component of several prokaryotic and eukaryotic enzymes that are involved in redox reactions. |
| The prokaryotic cell is small, its volume and mass being approximately one thousand times less than those of an average eukaryotic cell. |
| Among the deaminated bases, uracil, hypoxanthine and Xan are repaired by the base excision repair pathway in prokaryotic and eukaryotic cells. |
| Inorganic mercury, a heavy metal, is highly toxic to both eukaryotic and prokaryotic cells. |
| Several OYE homologues have been reported in prokaryotic and eukaryotic organisms. |
