Table 2
Free amino acids contents of porcine blood hydrolysates treated with various enzymes (mg/100 mL)

Amino acids		Protease*
		Control	Alcalase (A)	Neutrase (B)	Protex-40L (C)	PTPF-1430 (D)	KMFP-15 (E)
Essential amino acids	Isoleucine	14.85±1.391)	132.91±1.38	24.21±0.49	64.14±1.16	19.24±3.26	302.12±12.16
	Leucine	29.73±1.48	352.47±8.26	49.65±1.60	255.86±2.12	39.11±8.43	1,058.09±11.12
	Lysine	49.60±2.76	253.12±3.65	70.41±2.65	203.93±3.11	66.47±10.02	122.02±1.15
	Methionine	8.67±2.35	73.63±0.69	9.33±0.17	25.21±0.35	9.79±0.49	204.78±72.25
	Phenylalanine	16.90±2.52	252.64±4.16	26.64±0.44	204.59±2.41	31.51±12.05	949.70±60.66
	Threonine	18.90±1.31	143.78±1.02	32.34±1.09	105.81±1.33	28.84±6.49	75.41±2.04
	Valine	37.82±13.11	200.29±3.01	38.78±1.38	126.23±0.68	43.06±6.05	369.87±4.76
	Histidine	11.79±2.24	153.01±1.58	24.24±0.82	110.76±1.59	23.36±2.50	409.29±218.95
Total essential amino acids		188.26±8.81e2)	1,561.85±23.74b	275.60±7.76d	1,096.53±12.75c	261.38±49.28d	3,491.28±66.63a
Nonessential amino acids	Alanine	51.98±26.21	338.70±1.55	85.03±3.85	240.38±5.67	60.18±9.91	279.89±9.51
	Arginine	4.80±0.16	149.99±4.07	22.39±0.89	75.24±1.29	6.56±0.10	121.21±7.54
	Aspartic acid	1.68±0.52	66.38±1.03	3.32±0.12	28.42±0.75	3.47±2.29	149.72±16.43
	Glutamic acid	63.74±4.58	357.70±2.90	89.16±6.81	252.49±5.93	70.28±12.04	307.82±6.51
	Glycine	63.28±2.35	161.46±2.34	65.31±2.58	117.32±1.63	65.86±8.74	132.65±2.85
	Proline	34.80±2.89	101.08±0.91	46.07±0.81	80.24±0.63	42.67±2.54	80.30±2.84
	Serine	13.10±0.73	143.09±2.42	25.70±0.84	89.94±0.30	25.76±7.40	75.22±0.83
	Tyrosine	16.96±0.95	128.14±1.70	21.38±0.42	105.21±0.89	29.31±9.87	305.27±19.21
Total nonessential amino acids		250.34±27.45e	1,446.54±16.91a	358.36±14.29d	989.24±15.59c	304.09±52.68de	1,452.57±58.38b
Total amino acids		438.59±36.26e	3,008.38±40.66b	633.94±22.05d	2,085.77±28.34c	565.47±101.96d	4,943.85±8.25a

Test concentration of protease is 0.1% (w/v).
Mean±SD(n=2).
Values in the row with different superscript letters are significantly different at p<0.05.