Table 5.

SID (%) of CP and AA in six sources of SFM and one source of SFE^1,2

Item, %	SFM								SFM source		SFE	SFM vs. SFE
Origin:	United States	United States	Ukraine	Ukraine	Hungary	Italy	Mean	SD	SEM	P-value	United States	SEM	P-value
CP	79.3a	78.1a	70.1ab	75.2a	61.1b	82.7a	74.4	9.5	4.25	0.001	86.7	4.06	0.001
Indispensable AA
Arg3	93.4	93.0	86.6	89.7	83.7	93.5	90.0	4.1	2.82	0.023	98.1	2.67	0.002
His	80.7ab	81.7a	75.6ab	80.1ab	74.3b	81.5a	79.0	3.2	1.85	0.008	86.4	1.77	<0.001
Ile	82.5ab	84.6a	76.1b	81.2ab	77.5b	82.3ab	80.7	3.2	1.70	0.003	86.9	1.62	<0.001
Leu	83.5ab	84.9a	77.2b	81.7ab	78.1b	82.9ab	81.4	3.1	1.71	0.007	87.6	1.61	0.001
Lys	75.2	77.9	75.8	78.1	75.0	81.0	77.2	2.3	2.23	0.223	82.8	2.17	0.011
Met	89.5	89.6	86.3	88.6	86.6	89.0	88.3	1.4	1.11	0.093	91.3	1.05	0.008
Phe	85.6a	87.4a	78.5b	83.5ab	81.4ab	84.3ab	83.4	3.1	1.67	0.004	89.5	1.58	0.001
Thr	77.9a	78.6a	74.3ab	78.0a	71.5b	79.5a	76.6	3.1	2.16	0.047	82.7	2.07	0.005
Trp	89.3	90.8	87.7	89.1	85.0	90.2	88.7	2.1	1.53	0.088	91.1	1.47	0.121
Val	81.4ab	83.2a	74.9b	79.2ab	75.1b	81.2ab	79.2	3.5	1.89	0.005	85.5	1.79	0.001
Total	84.2a	85.4a	79.0b	82.8a	78.6b	84.6a	82.4	3.0	1.77	0.014	88.8	1.68	0.001
Dispensable AA
Ala	81.5a	82.7a	72.6a	77.4a	71.3b	82.8a	78.0	5.1	3.33	0.018	87.7	3.23	0.004
Asp3	79.2	80.6	74.1	78.5	74.3	80.2	77.8	2.9	1.99	0.033	84.2	1.91	0.001
Cys	71.1a	64.0ab	66.4a	69.6a	54.5b	72.4a	66.3	6.6	3.28	<0.001	73.4	3.16	0.021
Glu3	87.7	89.3	83.4	86.3	83.9	88.2	86.5	2.4	1.58	0.028	91.0	1.52	0.005
Gly	64.7a	63.8a	51.9ab	57.3ab	34.2b	70.3a	57.0	12.9	7.50	0.002	76.9	7.20	0.002
Ser	76.2a	76.6a	70.8ab	74.8a	65.1b	76.6a	73.3	4.6	2.52	0.003	82.2	2.41	<0.001
Tyr	79.8ab	82.1a	73.8ab	78.4ab	76.2ab	72.8b	77.2	3.6	2.23	0.016	85.8	2.12	<0.001
Total	80.7a	81.4a	74.4ab	78.2ab	71.5b	81.8a	78.0	4.2	2.46	0.007	86.0	2.36	0.001
Total AA	82.4ab	83.3a	76.6ab	80.4ab	74.9b	83.1a	80.1	3.6	2.11	0.009	87.3	2.02	0.001

¹Each least squares means is the mean of seven observations with the exception that the SID of CP and AA in SFE is the mean of eight observations.

²Values for SID were calculated by correcting the values for AID for basal ileal endogenous losses. Basal ileal endogenous losses were determined (g/kg of dry matter intake) as CP, 27.25; Arg, 1.36; His, 0.25; Ile, 0.40; Leu, 0.63; Lys, 0.52; Met, 0.10; Phe, 0.37; Thr, 0.61; Trp, 0.13; Val, 0.63; Ala, 1.05; Asp, 0.97; Cys, 0.20; Glu, 1.16; Gly, 2.93; Ser, 0.63; and Tyr, 0.33.

³Although the model in which SFM source was the fixed effect was significant for the SID of Arg, Asp, and Glu, the adjusted P-value of the pairwise multiple comparison for the SID of these AA was not significant.

^a–cWithin a row, means without a common superscript differ (P < 0.05).