Brazilian Journal of Chemical Engineering
On-line version ISSN 1678-4383
BURKERT, J. F. M.; KALIL, S. J.; MAUGERI FILHO, F. and RODRIGUES, M. I.. Parameters optimization for enzymatic assays using experimental design. Braz. J. Chem. Eng. [online]. 2006, vol.23, n.2, pp.163-170. ISSN 1678-4383. http://dx.doi.org/10.1590/S0104-66322006000200002.
The conditions for maximization enzymatic activity were determined using experimental design and inulinase from Kluyveromyces marxianus ATCC 16045. The effects of substrate concentration (sucrose and inulin), pH and temperature on inulinase activity were verified using four factorial design and surface response analysis. Using sucrose as substrate. It has bean shown that the effects sucrose on enzymatic activity is not statistically significant and the best condition for the highest activity (110 U/mL) was achieved with temperature between 60°C and 68°C and pH between 4.5 and 5.0. Using inulin as substrate it was verified that temperature is the only variable statistically significant and the maximum activity was 7.3 U/mL at temperature between 50°C and 51°C.
Keywords : inulinase; Kluyveromyces marxianus; activity; factorial design and response surface analysis.