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Plasma membrane of prokaryotic cells

75 Å thick unit-type membrane surrounding the cytoplasm is treated.

It has a similar structure to the membrane of eukaryotic cells , although it does not contain sterols. Another peculiarity is the existence of mesosomes, internal folds of the plasma membrane.

In addition to having the same functions as the eukaryotic plasma membrane, such as limiting the cell and regulating the passage of nutritional substances, mesosomes have other functions: