Comparative structural synthesis, principally Salmonella; architecture supports the homologous role, not an exact KT2440 stoichiometry.
"The axial structure is divided into 5 parts: the rod (FliE, FlgB, FlgC, FlgF, FlgG), the hook (FlgE), the hookâfilament junction (FlgK, FlgL), the filament (FliC or FljB) and the filament cap (FliD)"