These symbionts include both prokaryotic and eukaryotic organisms. Reversible phosphorylation of proteins occurs in both prokaryotic and eukaryotic organisms. Gene transcription occurs in both eukaryotic and prokaryotic cells. Chytrids mainly infect algae and other eukaryotic and prokaryotic microbes. Eukaryotic transcription is more complex than prokaryotic transcription. Membranes serve diverse functions in eukaryotic and prokaryotic cells. G418 blocks polypeptide synthesis by inhibiting the elongation step in both prokaryotic and eukaryotic cells. DNA transposons have been found in both prokaryotic and eukaryotic organisms. Chemotaxis assays are experimental tools for evaluation of chemotactic ability of prokaryotic or eukaryotic cells. Segregation of chromosomes is another difference between prokaryotic and eukaryotic cells. Hygromycin is active against both prokaryotic and eukaryotic cells. The process of translation is highly regulated in prokaryotic and eukaryotic organisms. Below are tables of common prokaryotic and eukaryotic endonucleases. Many types of prokaryotic and eukaryotic cells have a cell wall. In contrast to prokaryotic cells, eukaryotic cells are highly organised.