Abstract
It was previously reported that α-amylase accumulation is caused within the mycelium grown in a phosphate deficient medium and the concentration of anions or pH in a surrounding medium is responsible for its liberation. As it was subsequently found that α-amylase liberation from the mycelium of Aspergillus oryzae is stimulated by peptone, an attempt was made on purification of effective substances from it. The present paper describes on purification and properties of phosphopeptides found as an effective substance for α-amylase liberation, and discusses on the stimulation effect, comparing with the effects on pH and concentration of anions which were previously observed.
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