. 2017 Aug 1;8:63. doi: 10.1186/s40104-017-0194-0

Table 7.

Effects of methionine on superoxide dismutase (SOD), catalase (CAT), glutathione-S-transferase (GST), glutathione peroxidase (GPx), glutathione reducase (GR) activities and glutathione (GSH) contents in the hepatopancreas and intestine of sub-adult grass carp ¹

Met, g/kg diet	2.21	4.24	6.22	8.25	10.24	12.26
Hepatopancreas
SOD, U/mg protein	85.06 ± 6.35^a	96.33 ± 8.17^b	109.44 ± 4.24^c	97.08 ± 4.47^b	95.10 ± 6.64^b	94.63 ± 5.13^b
CAT, U/mg protein	29.91 ± 2.75^bc	28.57 ± 2.40^b	22.03 ± 2.23^a	27.32 ± 0.97^b	32.08 ± 3.44^c	36.53 ± 3.03^d
GST, U/mg protein	57.57 ± 2.39^d	28.52 ± 2.45^b	23.22 ± 2.31^a	20.79 ± 1.50^a	26.27 ± 1.72^b	44.93 ± 2.03^c
GPx, U/mg protein	1123.5 ± 67.1	1126.8 ± 53.8	1152.7 ± 62.8	1168.2 ± 39.4	1168.0 ± 57.8	1149.5 ± 56.6
GR, U/g protein	3.93 ± 0.35^a	7.73 ± 0.43^c	8.21 ± 0.72^c	4.50 ± 0.41^ab	4.68 ± 0.38^b	4.04 ± 0.32^ab
GSH, mg/g protein	7.11 ± 0.40^ab	9.11 ± 0.53^c	8.77 ± 0.61^c	7.12 ± 0.32^ab	7.28 ± 0.32^b	6.60 ± 0.26^a
Intestine
SOD, U/mg protein	21.32 ± 1.65^a	25.52 ± 1.27^b	29.83 ± 2.41^c	26.13 ± 2.01^b	25.65 ± 1.20^b	25.75 ± 3.03^b
CAT, U/mg protein	12.80 ± 1.35	14.02 ± 0.93	13.27 ± 0.37	13.48 ± 1.03	12.62 ± 1.2	13.28 ± 1.18
GST, U/mg protein	14.80 ± 0.85^b	14.88 ± 1.30^b	12.84 ± 1.26^a	14.08 ± 1.20^ab	13.10 ± 1.28^a	13.94 ± 1.37^ab
GPx, U/mg protein	85.41 ± 8.12^a	107.28 ± 11.02^b	101.91 ± 10.68^b	89.68 ± 9.60^a	80.54 ± 6.69^a	80.98 ± 5.46^a
GR, U/g protein	15.47 ± 1.36^a	23.81 ± 2.29^b	40.44 ± 3.90^c	26.51 ± 2.28^b	25.67 ± 2.39^b	26.27 ± 1.62^b
GSH, mg/g protein	0.63 ± 0.07^a	2.82 ± 0.16^e	3.70 ± 0.24^f	2.51 ± 0.11^d	2.31 ± 0.10^c	2.01 ± 0.14^b
Regressions
Y _{CAT in Hepatopancreas} = 0.327X²–4.037X + 37.644				R ² = 0.846		P = 0.061
Y _{GST in Hepatopancreas} = 1.246X²–19.063X + 91.601				R ² = 0.969		P = 0.006

^a-fMeans in the same row with different superscript letters differ significantly (P < 0.05)

¹Values are mean ± SD (n = 6)