Table 4.

Effects of l-arginine or N-carbamylglutamate (NCG) supplementation on TCA cycle key enzyme activities in the liver of intrauterine growth retarded suckling lambs¹.

Item	Groups2				SEM	P-value
	CON	IUGR	IUGR+1%Arg	IUGR+0.1%NCG
Citrate synthase, mIU/g protein	295a	209c	253b	251b	18.25	0.008
Isocitrate dehydrogenase, mIU/g protein	49.6a	30.2c	38.5b	38.1b	2.79	0.009
Alpha-oxoglutarate dehydrogenase complex, μg/g protein	384a	266c	312b	320b	21.96	0.011

^a,b,c Mean values within a row with different superscript letters were significantly different (P < 0.05).

¹Mean values with their SEM, n = 12 in each group.

²CON: the normal birth weight group given a control diet; IUGR: intrauterine growth retardation group given a control diet; IUGR+1% Arg: intrauterine growth retardation group given a 1% l-arginine-supplemented diet; IUGR+0.1%NCG: intrauterine growth retardation group given a 0.1% N-carbamylglutamate-supplemented diet.