Table 5. Analysis of the constituent amino acid contents in longissimus lumborum among cattle groups

Constituent amino acid (%)	JBC	Hanwoo	KBC	LS
Tyrosine	3.46±0.23	3.62±0.26	3.68±0.45	NS
Glycine	4.49±0.11	4.6±0.09	4.76±0.21	NS
Serine	4.13±0.49	3.93±0.15	3.67±0.03	NS
Alanine	5.78±0.5	5.78±0.54	5.69±0.03	NS
Aspartic acid	10.92±0.54b	10.29±0.62b	13.32±0.2a	***
Glutamic acid	17.33±1.37a	16.29±1.04a	14.31±0.18b	**
Lysine	9.00±0.22b	9.58±0.25a	9.81±0.09a	***
Leucine	7.68±0.32	8.25±0.5	7.9±0.14	NS
Methionine	0.82±0.08	1.82±1.12	0.6±0.15	NS
Valine	3.74±0.56b	4.68±0.29a	4.37±0.1a	*
Arginine	5.77±0.18b	6.45±0.47a	6.29±0.07a	**
Isoleucine	3.87±0.77b	4.88±0.3a	5.03±0.16a	*
Threonine	4.55±0.13b	4.68±0.11b	4.94±0.07a	***
Phenylalanine	3.56±0.36b	4.19±0.27a	4.06±0.08a	*
Proline	3.08±0.51	3.1±0.3	3.53±0.17	NS
Histidine	5.68±0.83	5.02±0.43	5.14±0.11	NS
Cystine	3.4±4.17	1.77±2.21	1.02±0.09	NS
Tryptophan	3.23±1.89	1.05±0.05	1.94±0.49	NS

Mean±SD.
Means with different superscripts in the same row significantly differ.
p<0.05;
p<0.01;
p<0.001.
JBC, Jeju black cattle; KBC, Korean black cattle; LS, level of significance; NS, not significant.