. 2020 Nov 12;10(11):2099. doi: 10.3390/ani10112099

Table 6.

Standardised ileal digestibility of amino acids in the seeds of the white-flowered pea cv. Tarchalska as affected by chicken age (14 or 28 d) and supplementation of assay diet with protease.

Amino Acid	Means for Treatment Combinations (n = 6)				Pooled SEM	p-Values for Main Effects Contrasts (n = 12)
Amino Acid	14 d −	14 d +	28 d −	28 d +	Pooled SEM	Age	Protease
Ala	0.828	0.843	0.836	0.838	0.0040	0.866	0.276
Arg	0.867 ^c	0.919 ^a	0.871 ^c	0.891 ^b	0.0047	0.006	0.000
Asp	0.848	0.857	0.856	0.857	0.0021	0.357	0.231
Cys	0.790 ^{a, b}	0.806 ^{a, b}	0.775 ^b	0.824 ^a	0.0065	0.922	0.011
Glu	0.898 ^a	0.897 ^a	0.881 ^b	0.892 ^{a, b}	0.0025	0.025	0.283
Gly	0.817 ^b	0.830 ^b	0.827 ^b	0.854 ^a	0.0046	0.041	0.020
His	0.855	0.860	0.850	0.852	0.0035	0.372	0.602
Ile	0.796	0.817	0.813	0.806	0.0037	0.672	0.289
Leu	0.826 ^b	0.854 ^a	0.825 ^b	0.832 ^b	0.0038	0.095	0.014
Lys	0.866 ^b	0.893 ^a	0.866 ^b	0.896 ^a	0.0039	0.764	0.000
Met	0.858	0.863	0.858	0.881	0.0079	0.605	0.421
Phe	0.854	0.855	0.836	0.862	0.0048	0.626	0.176
Pro	0.807 ^b	0.840 ^a	0.828 ^{a, b}	0.836 ^a	0.0051	0.360	0.037
Ser	0.803	0.814	0.818	0.818	0.0037	0.207	0.462
Thr	0.777 ^c	0.794 ^b	0.806 ^b	0.832 ^a	0.0059	0.001	0.026
Tyr	0.849	0.847	0.846	0.865	0.0042	0.344	0.341
Val	0.819	0.833	0.821	0.833	0.0039	0.952	0.111
17AA	0.833 ^c	0.848 ^{a, b}	0.836 ^{b, c}	0.851 ^a	0.0028	0.554	0.006
IAA	0.835 ^b	0.854 ^a	0.838 ^b	0.854 ^a	0.0029	0.778	0.002

‘−’ = without enzyme; ‘+’ = with enzyme; SEM = pooled standard error of the mean; 17AA = average digestibility of all amino acids analysed; IAA = average digestibility of nine indispensable amino acids (Arg, His, Ile, Leu, Lys, Met, Phe, Thr, Val). ^a–c Different superscript letters within rows indicate significant contrasts (p < 0.050) between treatment combination means.