Table 5.

Redox parameters of the liver in turkeys fed diets with different Met sources and content

	Redox parameters5
	Vit C μmol/kg	CAT U/g protein	SOD U/g protein	LOOH, μmol/kg	MDA μmol/kg
Treatment1
DLML	158	334b	15.9	4.14	1.29a
MHAL	137	327b	17.4	3.89	1.11a
DLMH	146	346b	17.3	4.28	0.74b
MHAH	137	424a	17.9	4.73	1.01ab
Dosage2 (D)
Low	148	330	16.7	4.01	1.20
High	141	385	17.6	4.50	0.88
Source3 (S)
DLM	152	340	16.6	4.21	1.01
MHA	137	376	17.7	4.31	1.06
p-values
D	0.125	0.009	< 0.001	0.042	0.002
S	< 0.001	0.079	< 0.001	0.662	0.598
D × S	0.127	0.039	0.087	0.141	0.026
SEM4	2.447	11.656	0.172	0.122	0.057

¹Diets fed to turkeys containing DL-methionine (DLM_L and DLM_H) and the equivalent amount of DL-methionine hydroxyl analogue (MHA_L and MHA_H) at two levels: low (_L) and high - (_H)

²Low level - 0.55 and 0.45% and high level - 0.78, 0.65%, in weeks 1–4 and 5–8 of feeding

³Sources of methionine: DL-isomer (DLM) and DL- methionine hydroxy analogue (MHA)

⁴SEM, standard error of the mean

⁵Vit C: vitamin C, SOD: superoxide dismutase, CAT: catalase, LOOH: lipid peroxides, MDA: malondialdehyde

^a-bvalues differ significantly