pH stability: L-Asparaginase from different sources shows different pH stability. Some are stable at acidic pH, some at
neutral while some have stability at alkaline pH. The extracellular asparaginase from Cyberlindnera jadinii were quite
stable at pH 4 for about 10 min at 50⁰C and upto 20h at 37⁰C. However it remain stable upto a maximum of pH 10
[119]. The purified enzyme from Pseudomonas stutzeri MB 405 having the optimum activity at pH 9 and 37⁰C showed
maximum stability in the range of pH 7.5 to 9.5 [54]. The enzyme derived from Helicobaterium pylori J99 remain
stable near pH 10 but rapidly loses its activity irreversibly at pH 10 or above [113]. Amena and others [65] reported the
enzyme from Streptomyces gulbargensis to be more stable at alkaline pH and retained its 80% of activity in the pH
range of 7-10.