抄録
Sulfur metabolism of S. miami, S. sendai and a variant of S. sendai was studied. These strains respectively utilize sulfur in the form of SO4, SO3, S2O3. By stepwise adaptation the latter two strains have come able to utilize SO4. A close relationship between the gradual adaptation of sulfur metabolism and the need for the compounds in the metabolic pathway from NH3 to tryptophan was observed.