No. 3 strain was screened from pectinase-producing strain of Asper-gtllus niger. This strain produces acid proteinase and a number of different hydro-lytic enzymes.
The mutant strain HD-1 was selected from the parent strain No. 3 by irradiation of copper vapor laser. By incubation of HD-1 in a simple solid fermentation medium at 28℃ for 48hr, the enzyme activities were: acid proteinase 7500U, cellu-lase Cx 9061U, cellulase CL 3581U, pectinase 5471U and glucoamylase 5532U. The enzyme activity was in...