Table 3.

Activity of antioxidant enzymes in Rhodococcus sp. NAU‐1

Antioxidant enzymes (μM min−1 mg−1 total protein)	AsIII: 0 mM	AsIII: 1 mM	AsIII: 5 mM	AsIII: 10 mM
CAT	6.90 ± 0.39	8.66 ± 0.10*	11.59 ± 0.08***	18.21 ± 0.49***
GST	2.10 ± 0.22	5.19 ± 0.19*	5.07 ± 0.01*	9.74 ± 0.8***
SODa	138.45 ± 1.47	459.58 ± 7.24**	1328.21 ± 91.15***	3355.35 ± 87.31***
APX	34.30 ± 1.68	45.54 ± 0.08**	43.30 ± 1.23**	74.17 ± 1.87***
GR	39.22 ± 2.92	27.24 ± 0.17*	25.38 ± 0.09**	14.88 ± 3.82**

^a.SOD is expressed in U mg⁻¹ total protein.

All enzyme activities were estimated in late log phase. All enzyme activities are expressed in μM min⁻¹ mg⁻¹ total protein except for SOD which is depicted in U mg⁻¹ total protein. The values are depicted as mean ± SEM of three independent observations.

^***P < 0.001; **P < 0.01; *P < 0.05. All parameters are compared with the control, i.e. culture without arsenite in medium.