TABLE 4.

Sporulation efficiency of B. subtilis strains carrying carboxy-terminal deletions of the BA3791 Phr protein^a

Plasmid	Viable count	Spore count	% Sporulationb
pHT315	1.9 × 108	1.3 × 108	68.4
pHT315-3790	3.9 × 108	9.2 × 107	23.6
pHT315-3790phr	3.3 × 108	1.0 × 108	31
pHT315-3790phr3	2.9 × 108	1.1 × 108	37.9
pHT315-3790phr4	2.6 × 108	1.0 × 108	39.2
pHT315-3790phr5	3.5 × 108	9.8 × 107	28
pHT315-3790phr6	5.1 × 108	8.2 × 107	16

^aJH642 derivative strains were grown for 36 hours in Schaeffer's sporulation medium containing erythromycin at 5 μg/ml.

^bRepresentative of two independent experiments.