Table 2.

Design of Taguchi's L₂₇OA and results for the activity of PGase.

Trial	χ 1	χ 2	χ 3	χ 4	χ 5	χ 6	†Response (U/mL)	Prediction (U/mL)
1	−1	−1	−1	−1	−1	−1	11.42 ± 0.18	11.40
2	−1	−1	−1	−1	0	0	11.32 ± 0.14	11.36
3	−1	−1	−1	−1	1	1	13.05 ± 0.09	13.00
4	−1	0	0	0	−1	−1	12.84 ± 0.19	12.89
5	−1	0	0	0	0	0	11.64 ± 0.07	11.59
6	−1	0	0	0	1	1	12.89 ± 0.15	12.92
7	−1	1	1	1	−1	−1	14.64 ± 0.23	14.62
8	−1	1	1	1	0	0	12.36 ± 0.07	12.38
9	−1	1	1	1	1	1	11.86 ± 0.18	11.90
10	0	−1	0	1	−1	0	13.00 ± 0.12	13.96
11	0	−1	0	1	0	1	15.52 ± 0.16	15.48
12	0	−1	0	1	1	−1	12.86 ± 0.09	12.84
13	0	0	1	−1	−1	0	11.15 ± 0.18	11.12
14	0	0	1	−1	0	1	14.86 ± 0.12	14.82
15	0	0	1	−1	1	−1	15.24 ± 0.18	15.14
16	0	1	−1	0	−1	0	15.08 ± 0.22	15.12
17	0	1	−1	0	0	1	13.74 ± 0.04	13.80
18	0	1	−1	0	1	−1	11.69 ± 0.16	11.71
19	1	−1	1	0	−1	1	12.42 ± 0.24	12.45
20	1	−1	1	0	0	0	12.79 ± 0.05	12.82
21	1	−1	1	0	1	−1	16.48 ± 0.12	16.52
22	1	0	−1	1	−1	1	14.00 ± 0.18	14.06
23	1	0	−1	1	0	0	15.65 ± 0.10	15.62
24	1	0	−1	1	1	−1	13.45 ± 0.12	13.48
25	1	1	0	−1	−1	1	13.37 ± 0.05	13.38
26	1	1	0	−1	0	0	11.56 ± 0.08	11.58
27	1	1	0	−1	1	−1	12.65 ± 0.15	12.64

^†Experimental values are mean of triplicates test.