. 2018 Dec 11;97(3):998–1009. doi: 10.1093/jas/sky461

Table 3.

Standardized digestibility (%) of indispensable AA and select dispensable AA of chicken-based ingredients using the precision-fed cecectomized rooster assay¹

Item	Chicken meal	Retorted chicken	Steamed chicken	Raw chicken	SEM	P-value
Indispensable AA
Arginine, %	85.56^b	89.29^ab	92.62^a	88.89^ab	1.166	0.0120
Histidine, %	76.94^c	83.34^ab	87.83^a	79.75^bc	1.355	0.0013
Isoleucine, %	82.30^b	88.33^a	91.90^a	90.76^a	0.885	0.0001
Leucine, %	82.90^b	88.31^a	92.10^a	90.74^a	0.917	0.0004
Lysine, %	78.78^b	84.68^ab	91.02^a	86.57^ab	2.038	0.0133
Methionine, %	85.95^c	90.63^b	94.79^a	93.35^ab	0.649	<0.0001
Phenylalanine, %	80.95^b	86.68^a	90.63^a	88.84^a	1.088	0.0016
Threonine, %	75.32^b	82.94^a	88.02^a	84.64^a	1.492	0.0011
Tryptophan, %	89.60^b	93.78^a	95.36^a	94.24^a	0.569	<0.0001
Valine, %	78.60^b	84.97^a	89.09^a	86.27^a	1.261	0.0017
Selected dispensable AA
Alanine, %	82.34^b	88.15^a	91.73^a	88.82^a	1.124	0.0023
Aspartic acid, %	66.14^b	73.30^b	90.36 ^a	88.85^a	2.038	<0.0001
Cysteine, %	52.44^b	52.90^ab	68.37^a	50.22^b	3.443	0.0178
Glutamic acid, %	80.24^b	87.20^a	90.80^a	87.41^a	1.201	0.0006
Glycine, %	72.89^a	73.56^a	73.78^a	57.58^b	2.626	0.0040
Proline, %	77.09^b	85.61^ab	86.66^a	77.64^b	1.853	0.0117
Serine, %	71.02^b	78.70^ab	84.38^a	79.67^ab	1.896	0.0059
Tyrosine, %	78.20^c	86.49^ab	90.42^a	84.18^b	0.965	<0.0001

^a–cMeans with different superscripts within a row differ (P < 0.05).

¹ n = 4 roosters per treatment.