Mycobacterium bovis BCG vaccine strains lack narK2 and narX induction and exhibit altered phenotypes during dormancy.
Honaker RW, Stewart A, Schittone S, Izzo A, Klein MR, Voskuil MI. Mycobacterium bovis BCG vaccine strains lack narK2 and narX induction and exhibit altered phenotypes during dormancy. Infect Immun. 2008 Jun; 76(6):2587-93.