A ROTATING TAIL

摘要

Many bacteria have tails too. These bacterial tails (pictured left) look like smaller versions of the f lagell. of complex cells (bottom) and so were called f lagella too, but that is where the similarities end. Bacterial tails are made of different proteins put together in a different way. They also vary a lot from species to species: of the 40 different kinds of protein found in E. coli's tail, for example, only half are common to all the other bacterial f lagella studied so far.