title: Production of phytase by a marine yeast Kodamaea ohmeri BG3 in an oats medium: optimization by response surface methodology.
abstract: Statistical experimental designs were applied for the optimization of phytase production by a marine yeast Kodamaea ohmeri BG3 in a cost-effective oats medium. Using Plackett-Burman design, oats, ammonium sulfate and initial pH were identified as significant factors and these factors were subsequently optimized using a central composite design (CCD). The optimum variables that supported maximum enzyme activity were oats 1.0%, ammonium sulfate 2.3%, glucose 2.0%, NaCl 2.0% and initial pH 6.3. The validity of the optimized variables was verified in shake-flasks level. An overall 9-fold enhancement in phytase activity (62.0-->575.5 U/ml) was attained due to the optimization.
authors.affiliation: UNESCO Chinese Center of Marine Biotechnology, Ocean University of China, Yushan Road, No. 5, Qingdao, China.
authors.forename: X Y
authors.initials: XY
authors.lastname: Li
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Liu
authors.forename: Z M
authors.initials: ZM
authors.lastname: Chi
mesh_terms: D010832:6-Phytase / Q000096:biosynthesis*; D018554:Avena; D003470:Culture Media; D008386:Marine Biology; D008962:Models, Theoretical; D015003:Yeasts / Q000201:enzymology*
chemical_list: D003470:Culture Media; D010832:6-Phytase