Hydrolysis Process Optimization and Functional Characterization of Yak Skin Gelatin Hydrolysates

Table 1

Amino acid composition of yak skin gelatin hydrolysates and porcine skin gelatin hydrolysates.

Amino acid	Composition/100 g gelatin hydrolysates of yak skin [34].
Aspartate	4.90 ± 0.38
Threonine	1.35 ± 0.16
Serine	2.32 ± 0.31
Glutamic acid	10.34 ± 0.11
Proline	12.87 ± 0.40
Glycine	19.88 ± 0.24
Alanine	6.50 ± 0.17
Cysteine	0.46 ± 0.02
Valine	1.86 ± 0.07
Methionine	0.98 ± 0.04
Isoleucine	1.08 ± 0.09
Leucine	2.40 ± 0.19
Tyrosine	1.02 ± 0.02
Phenylalanine	2.34 ± 0.25
Histidine	0.63 ± 0.03
Lysine	3.02 ± 0.32
Arginine	5.73 ± 0.23
Hydroxyproline	7.08 ± 0.56
Hydrophilic amino acid	55.25 ± 1.56 (65.18%)
Hydrophobic amino acid	29.51 ± 0.48 (34.82%)
Total	84.76 ± 2.02

Values are given as means ± standard deviations from triplicate determination.