Research Article

Medium Optimization by Response Surface Methodology for Improved Cholesterol Oxidase Production by a Newly Isolated Streptomyces rochei NAM-19 Strain

Table 4

BBD representing the predicted CO production by S. rochei NAM-19. Levels of coded variables are in parenthesis.

RunX1
Glucose (g/L)
X2
Yeast extract (g/L)
X3
Malt extract (g/L)
X4
CaCO3 (g/L)
Response CO activity (U/mL)

14 (−1)0 (−1)12 (0)4 (0)26.300
28 (+1)0 (−1)12 (0)4 (0)43.600
34 (−1)4 (+1)12 (0)4 (0)34.040
48 (+1)4 (+1)12 (0)4 (0)54.000
56 (0)2 (0)10 (−1)2 (−1)42.400
66 (0)2 (0)14 (+1)2 (−1)36.000
76 (0)2 (0)10 (−1)6 (+1)43.440
86 (0)2 (0)14 (+1)6 (+1)35.840
94 (−1)2 (0)12 (0)2 (−1)33.640
108 (+1)2 (0)12 (0)2 (−1)49.240
114 (−1)2 (0)12 (0)6 (+1)31.100
128 (+1)2 (0)12 (0)6 (+1)52.700
136 (0)0 (−1)10 (−1)4 (0)36.300
146 (0)4 (+1)10 (−1)4 (0)45.200
156 (0)0 (-1)14 (+1)4 (0)29.140
166 (0)4 (+1)14 (+1)4 (0)38.340
174 (−1)2 (0)10 (−1)4 (0)33.880
188 (+1)2 (0)10 (−1)4 (0)57.730
194 (−1)2 (0)14 (+1)4 (0)32.120
208 (+1)2 (0)14 (+1)4 (0)45.500
216 (0)0 (−1)12 (0)2 (−1)34.200
226 (0)4 (+1)12 (0)2 (−1)38.600
236 (0)0 (−1)12 (0)6 (+1)29.976
246 (0)4 (+1)12 (0)6 (+1)43.700
256 (0)2 (0)12 (0)4 (0)41.500
266 (0)2 (0)12 (0)4 (0)40.300
276 (0)2 (0)12 (0)4 (0)39.500