TABLE 2.

Effects of clpP and clpC mutations on sporulation

B. thuringiensis strain	Sporulation frequency (CFU ml−1) after 24 h incubation in HCT, plating:		% Sporulation
	Before heat treatment	After heat treatment
407 Cry−	2.88 × 108	2.5 × 108	86
407 Cry− ΔclpC	1.72 × 108	1.4 × 105	0.072
407 Cry− ΔclpP1	2.84 × 108	1.71 × 108	60.2
407 Cry− ΔclpP2	4 × 107	300	0.00075