Table 3. The enzymatic activities of other antioxidant enzymes of different cell groups 48 h after RNAi.

Cell lines	Enzymatic activity	Blank	Prx1 siNeg	Prx1 siRNA	Prx5 shNeg	Prx5 shRNA	Combined Neg	Combined
Eca-109	CAT	33.70±0.70	32.60±2.61	34.23±2.01	33.01±2.20	32.90±2.60	31.77±1.90	33.87±1.31
	GPx	1.88±0.29	1.74±0.57	1.63±0.34	1.59±0.29	1.84±0.38	1.37±0.30	1.78±0.34
	Mn-SOD	4.48±0.79	4.24±0.52	3.98±0.60	4.48±0.21	4.38±0.18	4.12±0.44	3.66±0.27
	Cu/Zn-SOD	2.94±0.47	3.23±0.51	2.05±0.49	2.87±0.59	2.70±0.55	2.13±0.52	2.64±0.22
TE-1	CAT	33.63±2.94	33.33±3.73	31.43±2.00	32.87±2.06	33.90±1.30	34.03±2.34	33.23±2.39
	GPx	1.92±0.66	1.86±0.54	1.57±0.25	1.75±0.20	1.94±0.62	1.67±0.25	1.97±0.76
	Mn-SOD	4.78±0.23	4.00±0.64	4.39±0.20	4.03±0.09	4.45±0.45	3.99±0.42	3.82±0.35
	Cu/Zn-SOD	3.06±0.50	3.08±0.44	3.01±0.71	3.19±0.31	2.84±0.62	2.92±0.33	2.38±0.16

Abbreviations are: CAT, catalase; SOD, Mn- and Cu/Zn- superoxide dismutase; GPx, glutathione peroxidase.

^*SOD: U/mg protein; CAT, μmol/L H₂O₂ per min per mg protein; GPx: μmol/L NADPH per min per mg protein.