The Aspergillus oryzae 3.4383 start strain mutated multiply by UV and EMS, a mutant strain UV-2’was obtained by separation, purification and cultivation.The mutant strains’activity of proteinase and cellulase was increased 3250 U/g and 1145 U/g to compare with the original (2526 U/g and 1145 U/g), the strain of UV-2’Aspergillus oryzae has good hereditary stability by inoculating 20 times.
The mutation conditions:the distance is 28 cm,the time of irradiation is 60s with 30W ultraviolet lamp,the c...