Structure
The structure of flagellin is responsible for the helical shape of the flagellar filament, which is important for its proper function.
The N- and C-termini of flagellin form the inner core of the flagellin protein, and is responsible for flagellin's ability to polymerize into a filament. The central portion of the protein makes up the outer surface of the flagellar filament. While the termini of the protein is quite similar among all bacterial flagellins, the central portion is wildly variable.
Read more about this topic: Flagellin
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