Abstract
Having verified the presence of trypsin inhibiting substances in purple laver, the study was made on their properties and thd following results were obtained.
1. The extracted volume of inhibitors increased in proportion to the concentration of sodium chloride. Extraction was optimal near the neutrality. 2. The substances showed no inhibiting effect on pepsin but contrarily they were digested by pepsin and their inhibiting effect was reduced by about 50%. They were mostly precipitated at 0.8 saturation of ammonium sulphate and of aceton. 3. The inhibiting substances were separated into two patterns by means of DEAE-cellulose column chromatography. 4. Stability in heat resistance was quite high in some substances but not so high in some others.
