. 2015 Aug 8;6(1):34. doi: 10.1186/s40104-015-0032-1

Table 6.

Effects of dietary threonine levels on activities of AP, γ-GT, CK and Na⁺/K⁺-ATPase in intestine of sub-adult grass carp^f

Item	Dietary Thr levels, g/kg diet
	3.3	5.9	8.4	10.9	13.1	15.8
AP, mmol of nitrophenol released g/protein per h
PI	69.5 ± 7.3^a	84.4 ± 8.1^b	102.8 ± 10.1^cd	108.0 ± 10.7^d	125.0 ± 10.4^e	92.8 ± 9.1^bc
MI	110.1 ± 7.0^c	120.3 ± 13.0^cd	125.8 ± 4.9^d	117.6 ± 8.2^cd	91.9 ± 8.6^b	71.3 ± 7.4^a
DI	72.2 ± 6.9^c	80.3 ± 7.5^d	69.0 ± 5.4^c	54.7 ± 5.3^b	53.8 ± 2.6^b	35.8 ± 2.8^a
γ-GT, mmol of 5-amino-2-nitrobenzoate released g/protein per min
PI	1.82 ± 0.16^a	2.27 ± 0.15^b	2.59 ± 0.28^c	2.52 ± 0.15^c	3.00 ± 0.16^d	2.24 ± 0.23^b
MI	2.12 ± 0.16^a	2.89 ± 0.26^b	3.05 ± 0.21^b	3.09 ± 0.17^b	2.93 ± 0.19^b	2.94 ± 0.28^b
DI	0.73 ± 0.08^a	0.87 ± 0.11^b	1.20 ± 0.07^c	1.23 ± 0.12^c	1.13 ± 0.11^c	0.76 ± 0.06^ab
CK, μmol of phosphorus released g/protein per h
PI	2.62 ± 0.25^c	2.72 ± 0.19^c	2.74 ± 0.24^c	3.11 ± 0.29^d	1.52 ± 0.13^b	1.14 ± 0.13^a
MI	1.36 ± 0.09^a	2.40 ± 0.18^c	2.35 ± 0.17^c	4.47 ± 0.44^d	4.28 ± 0.34^d	1.77 ± 0.17 ^b
DI	6.69 ± 0.73^a	7.26 ± 0.44^a	6.96 ± 0.67^a	9.35 ± 0.45^b	8.86 ± 0.70^b	7.15 ± 0.75^a
Na⁺/K⁺-ATPase, μmol of phosphorus released g/protein per h
PI	0.37 ± 0.06^b	0.42 ± 0.05^c	0.41 ± 0.02^c	0.36 ± 0.03^b	0.37 ± 0.03^b	0.30 ± 0.03^a
MI	0.48 ± 0.04^c	0.62 ± 0.04^d	0.47 ± 0.03^bc	0.43 ± 0.04^ab	0.39 ± 0.03^a	0.39 ± 0.04^a
DI	0.35 ± 0.02^a	0.34 ± 0.02^a	0.35 ± 0.02^a	0.36 ± 0.01^a	0.35 ± 0.03^a	0.35 ± 0.02^a

AP: Alkaline phosphatase; γ-GT: γ-Glutamyl transpeptidase; CK: Creatine kinase; PI: Proximal intestine; MI: Mid intestine; DI: Distal intestine

^a,b,c,d,eMeans in the same row without a letter in common are significantly different (P< 0.05)

^fValues are mean ± SD (n = 6)