[Isolation of protease complexes from Streptomyces griseus by ultrafiltration]. / Vydelenie kompleksa proteaz Streptomyces griseus metodom ul'trafil'tratsii.

The possibility of concentrating proteases from Streptomyces griseus by the ultrafiltration technique using Soviet membranes of the MB-I-IV type was explored. This method allowed a 3-10 fold reduction of the native solution of enzymes and their simultaneous purification from by-products.

[Preparation and properties of acid proteinase from Aspergillus awamori]. / Preparat kisloi proteinazy Aspergillus awamori i nekotorye ee svoistva.

From the culture liquid filtrate of Aspergillus awamori 78-2 a preparation of acid proteinase was isolated and its properties were described. This producer was shown to have a peculiar capacity of synthesizing under submerged conditions extracellular acid proteinase as the sole proteolytic enzyme. The preparation of acid proteinase showed a comparatively high hydrolyzing capacity. Under optimal conditions the enzyme degraded hemoglobin and albumin almost completely. The possibility of purifying and concentrating acid proteinase on the ion-exchange resin KB 51 X 2 was explored.