TABLE 2.

Restoration of sporulation frequency of the ΔL1 mutant by Mg²⁺

Strain description	CFU · ml−1a		Frequency (%) ± SDa
	Total	Spores
wt	6.4 × 108	5.8 × 108	90 ± 7.9
ΔL23	4.9 × 108	3.5 × 108	71 ± 5.8
ΔL36	6.4 × 108	4.6 × 108	73 ± 13
ΔS6	3.5 × 108	2.7 × 108	77 ± 12
ΔL1	1.6 × 108	2.3 × 102	(1.7 ±1.2) × 10−4
ΔL1 ΔyhdP/pDGmgtE	3.1 × 108	7.5 × 107	25 ± 4.7

^aMeans from three independent experiments.