Streptomyces canus NRC-718 sub sp as a source of glucose isomerase

Twenty-four of Streptomyces isolated from Egyptian soil samples were tested for the production of glucose isomerase. Streptomyces NRC-718 was closely related to Streptomyces canus according to the morphology, cultural and physiological properties was the highest producer of glucose isomerase among other tested strains. The enzyme was extracted from cells suspension ultrasonically. D-xylose served as substrate for the enzyme and the value of specific activity was 2.35 units/mg protein