Table 4. Metabolite profiles detected from Jeju crossbred cattle loin cuts during wet aging

Metabolites (mg/100 g)	Aging day					SEM
Metabolites (mg/100 g)	0	7	14	21	28	SEM
Organic acids
Acetate	10.25^ab	7.20^b	9.69^ab	15.47^a	10.60^ab	1.709
Lactate	405.85^a	415.48^a	393.40^a	371.85^a	382.62^a	27.506
Fumarate	2.07	4.13	3.42	3.30	4.35	0.513
Amino acids and peptides
Alanine	25.74	30.00	33.87	38.11	37.80	2.978
Asparagine	2.65^d	5.41^c	7.19^bc	8.53^b	11.45^a	0.541
Glutamate	7.50^b	7.81^b	12.12^ab	15.18^ab	16.35^a	1.790
Glycine	12.24	11.74	12.04	13.48	14.44	1.209
Isoleucine	2.16^c	4.99^bc	7.31^b	9.22^ab	14.19^a	1.074
Leucine	3.92^c	9.67^bc	13.33^b	16.14^b	25.69^a	1.948
Methionine	0.00^c	4.76^b	7.07^b	8.38^ab	12.07^a	0.851
Tyrosine	2.24^b	5.14^b	6.81^ab	6.65^ab	12.49^a	1.500
Valine	2.81^c	5.82^bc	8.26^b	11.08^b	16.58^a	1.152
Phenylalanine	2.31^c	5.44^bc	7.78^b	10.26^b	15.75^a	1.173
Anserine	25.47	42.83	37.39	43.36	47.41	6.333
Betaine	10.90	10.84	10.57	10.97	8.41	0.983
Carnitine	76.12	74.62	67.47	63.71	54.24	5.857
Carnosine	152.3	153.51	158.21	160.57	182.44	16.377
Creatine	202.09	207.58	194.99	184.57	191.53	17.050
Taurine	27.28	28.18	30.75	19.05	28.80	2.780
Nucleotides and nucleosides
Uridine	1.53^b	2.54^a	2.37^ab	2.30^ab	1.76^ab	0.204
Hypoxanthine	19.26^c	32.49^b	39.3^ab	42.66^ab	43.5^a	2.267
IMP	54.89^a	37.29^a	11.08^b	4.85^b	4.32^b	5.113
Inosine	11.20	9.73	9.76	5.28	7.51	1.275
Others
Ethanol	0.35^b	0.49^ab	0.47^ab	0.58^ab	0.91^a	0.102
Formate	1.77	0.64	0.82	6.24	4.84	2.505
Niacinamide	2.05	2.82	2.50	2.00	2.57	0.316

Different letters within the same row indicate significant differences (p<0.05).