| Several OYE homologues have been reported in prokaryotic and eukaryotic organisms. |
| The DNA of a prokaryotic cell consists of a single chromosome that is in direct contact with the cytoplasm. |
| Recently, large numbers of new retinal proteins were discovered in both prokaryotic and eukaryotic organisms. |
| Inorganic mercury, a heavy metal, is highly toxic to both eukaryotic and prokaryotic cells. |
| Another characteristic feature that distinguishes eukaryotic from prokaryotic genes is the presence of introns. |
| This reaction and similar ones occur in a number of unrelated organisms, both prokaryotic and eukaryotic. |
