Reference:
Forslund AL, Salomonsson EN, Golovliov I, Kuoppa K, Michell S, Titball R, Oyston P, Noppa L, Sjöstedt A, Forsberg A. The type IV pilin, PilA, is required for full virulence of Francisella tularensis subspecies tularensis. BMC Microbiology 2010;10: 227.