. Frozen soy fiber paste obtained from EAEP was lyophilized and used without fur ther processing for fermentation. Soy skim was adjusted to pH 7.5 with phosphoric acid, sterilized by autoclaving and added to sterile S-7 medium as a partial or total (10-100% (v/v))replacement for the water component and total replacement for soluble CHO source, as well as providing a potential source of nitrogen. Except for glucose (where indicated), all other S-7 medium components were present in their normal concentrations