Motility (correspondence, Naotake Ogasawara)

     B. subtilis 168 and mutant strains were grown overnight on LB plates at 37. Single colony of each mutants were streak carefully at one point of a 0.8% Tryptose blood agar base plate (Difco). After incubation for 10-12 h at 37, swarm diameter of mutants was compared with that of 168.