Table 3.

The structural proteins of animal ETEC

Fimbriae	Fimbrial diameter	Major subunit	Minor subunits	References
F4	2–4 nm	FaeG	FaeC, FaeF, FaeH, FaeI, (FaeJ)	46, 58, 59, 113, 122, 246
F41	3.2 nm	Like F4	(No genes or protein names)	181, 182, 271
F5	∼ 3 nma	FanC	FanF, FanG, FanH	112, 251–254, 614, 615
F6	7 nm	FasA	FasF, FasG	106, 123, 195, 616, 617
F18	6.7 nm	FedA	FedE, FedF	115, 199, 258
F17	3–4 nm	F17-A	F17-G	215, 590, 618

^a Reported wider values were likely due to strand bundling.