So prokaryotic Flagellum consists of a single global protein known as Flagellin and Flagellin. This protein basically wraps around in a helical fashion to create a rigid hollow cylinder. So let's suppose we have one type of prokaryotic organism, let's say a gram negative bacteria. And a gram negative bacteria contains our cytoplasm, which is this section. We have an inner membrane. We have a cell wall that consists of peptidoglycan.