MKKTLLAIILGGMAFATTNASANTGTINFNGKITSATCTIDPEVNGNRTSTIDLGQAAISGHGTVVDFKLKPAPGSNDCLAKTNARIDWSGSMNSLGFNNTASGNTAAKGYHMTLRATNVGNGSGGANINTSFTTAEYTHTSAIQSFNYSAQLKKDDRAPSNGGYKAGVFTTSASFLVTYM FANC_ECOLX 181 Fimbriae (also called pili), polar filaments radiating from the surface of the bacterium to a length of 0.5-1.5 micrometers and numbering 100-300 per cell, enable bacteria to colonize the epithelium of specific host organs. K99 fimbrial protein FanC is the main component of the K99 fimbriae. fanC