Table 5.

Concentrations of inositol phosphates (InsP) and myo-inositol in ileal digesta and feces of pigs¹

Dietary Ca, g/kg DM	5.5		8.5		SEM	P-value
Exogenous phytase, FTU/kg of diet	0	1,500	0	1,500		Calcium	Phytase	Calcium × phytase
Ileal digesta2, µmol/g DM
InsP6	33.3a	4.5c	33.1a	6.6b	0.59	0.025	<0.001	0.023
Ins(1,2,4,5,6)P5	2.4	0.3	2.5	0.5	0.05	0.027	<0.001	0.078
Ins(1,2,3,4,5)P5	1.4	0.6	1.4	0.8	0.09	0.305	<0.001	0.516
Ins(1,2,3,4,6)P5	0.7	n.d.	0.7	n.d.	0.03	0.968	—	—
Ins(1,2,5,6)P4	0.5	1.9	0.4	2.3	0.23	0.646	<0.001	0.349
Ins(1,2,3,4)P4	0.3	2.3	0.3	2.9	0.31	0.389	<0.001	0.468
InsP3x3	0.5	8.1	0.4	8.1	0.59	0.880	<0.001	0.856
Ins(1,2)P2	n.d.	4.9	n.d.	2.9	0.63	0.013	—	—
Myo-inositol	1.5	7.0	1.5	7.0	0.76	0.748	<0.001	0.562
Neu5Ac4, g/kg DM	0.35	0.30	0.36	0.37	0.04	0.064	0.300	0.154
Feces2, µmol/g DM
InsP6	3.7	1.4	11.6	3.8	2.89	0.004	0.015	0.487
Ins(1,2,4,5,6)P5	0.8	n.d.	1.3	0.3	0.21	0.013	<0.001	—
Ins(1,2,3,4,5)P5	n.d.	n.d.	0.4	0.2	0.15	—	0.361	—
Ins(1,2,5,6)P4	0.2	n.d.	0.3	n.d.	0.05	0.031	—	—
Myo-inositol	0.8	0.4	0.7	0.4	0.08	0.537	0.014	0.442

¹Least squares means based on eight observations per diet.

²Inositol phosphate isomers not mentioned here were not detectable (n.d.) or below limit of quantification.

³A clear discrimination was not possible because of co-elution, at least one of the following isomers Ins(1,2,6)P₃, Ins(1,4,5)P₃, Ins(2,4,5)P₃.

⁴ N-acetylneuraminic acid.

^a,b,cWithin a row, individual treatment means without a common superscript differ significantly (P < 0.05).