Glucanase 5kg - Murphy & SonGlukanase 5kg The enzymic activity of Glucanase is effective in the temperature range from 40C to 75C, with the optimum performance at 60C. The pH range for the activity of Glucanase is approximately from 3. 5 6. 5, with an optimum performance at pH 5. 5. The exact pH optimum will depend on process variables, including temperature, time, substrate nature and concentration. How much of the Glucanase to add and where to add it? Brewhouse Glucanase