An 5mm disc of mycelium from positive agar plate was used as inoculum for asparaginase production under liquid
state using modified Czapex dox’s broth, for 120 h at 370C with shaking at 200 rpm. The activity of enzyme was
determine in filtrate by means of Nesslerization as described by Imada [7].The substrate was prepared in 0.05M tris
(hydroxymethyl) amino methane (tris HCl) (pH 7.2), giving final concentration of 0.04M. The reaction mixture
contains 200μl of 0.04 M asparagine in 0.05 M tris HCl buffer, 100μl of 0.05 M tris HCl buffer (PH 7.2), 100μl
distilled water and 100μl of crude enzyme which was obtained from the culture filtrate .The samples were incubated
at 370C for 60 min and to stop reaction 100μl of 1.5M tichloroacetic acid (TCA) was added.100μl of mixture was
than mixed with 750μl distilled water and than nesslers reagent was added and for all incubation was allowed at
200C for 20 min. All reactions were measured spectrophotometrically at 450nm.One unit of asparaginase is the
amount of enzyme which catalyses the formation of 1μmol of ammonia per min at 370C. Asparaginase was partially
purified by following steps (A-D)