Table 3. Effect of modified casein and whey protein ratio on protein quality in rats fed diets with modified casein to whey protein ratio for 4 weeks (n=8 for each group)

	CW-10:0	CW-8:2	CW-5:5	CW-2:8
Protein efficiency ratio (%)	2.99±0.05^b	3.04±0.03^b	3.29±0.09^a	3.06±0.02^ab
Net protein ratio (%)	3.31±0.04^b	3.37±0.03^b	3.57±0.07^a	3.40±0.02^ab
Nitrogen intake (g/rat)	1.02±0.04^a	0.98±0.02^a	0.97±0.02^a	1.03±0.03^a
Fecal nitrogen (g/rat)	0.12±0.00^a	0.09±0.01^b	0.09±0.00^b	0.07±0.01^c
True digestibility (%)	92.7±0.22^b	93.2±0.25^b	93.5±0.15^b	94.8±0.22^a

Data are expressed as mean±SEM.
The values with different letters in the same row indicate significant differences at p<0.05.
CW, casein:whey protein.