RESUMEN
A new strain of Streptomyces regensis was isolated from soil to produce a novel antibiotic AGPM possessing a strong antitumor activity In order to study on the metabolic path of the novel antibiotic AGPM, the protein patterns from the strain of Streptomyces regensis at different culture period were analyzed by using two eimensional polyacrylamide gel electrophoresis Comparing with sample from growth phase, seventeen new protein spots were found in that from antibiotic production phase The results demonstrated that the special proteins might be related with the antibiotic AGPM biosynthesis from Streptomyces regensis
RESUMEN
of Streptomyces regensis was isolated from soil to produce a novel antibiotic AGPM of a strong biological activity of antitumor The strain was irradiated by UV after treatment with LiCl to give a AGPM yield of 1 87?10 2 mg mL 1 , 2 2 times higher than that of the original strain The optimum UV irradiation time was 30～60 s and the best LiCl concentration was 0 05～0 09 mol/L The fermentation of AGPM was conducted in a 30 L stirred tank, the maximum yield of AGPM using the mutants reached 1 85?10 2 mg mL 1 , while that using the original strain was only 0 85?10 2 mg mL 1