Abstract
1. The synthesis of sulpholactic acid in sporulating cultures of Bacillus subtilis was studied. 2. Sulpholactic acid was first detected about 4h after the initiation of sporulation and 1h before refractility. The rate of synthesis paralleled that of the other events of sporulation examined. 3. Sulpholactic acid accounted for 1.7% of the material of the spore. 4. Because the addition of chloramphenicol in the earlier stages of sporulation inhibited formation of the compound, it is likely that the enzymes concerned are synthesized de novo during sporulation. 5. In asporogenous mutants only those blocked at a late stage and showing partial refractility were able to produce sulpholactic acid. This correlation makes sulpholactic acid a useful marker event in sporulation.
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