Table 2.

Correlations between the proportions of MyHC1 (%) and free amino acid contents in muscle samples from Japanese Black steers

Amino acids and dipeptides	Correlation coefficients (r)	Significance	Mean (μmol/g)	Minimum (μmol/g)	Maximum (μmol/g)	Threshold (mM)(Schiffman et al., 1981)
Alanine	0.458	p < 0.01	3.740	0.830	7.408	16.2
Arginine	0.051	NS	0.259	0.091	0.563	1.20
Asparagine	0.107	NS	0.113	0.022	0.390	1.62
Aspartic acid	−0.252	p < 0.05	0.093	0.012	0.226	0.18
β‐alanine	0.369	p < 0.01	0.099	0.011	0.321
Citrulline	−0.027	NS	0.025	ND	0.066
Cystathionine	0.098	NS	0.003	0.00014	0.017
γ‐aminobutyric acid	0.111	NS	0.053	ND	0.257
Glutamic acid	0.164	NS	5.203	0.603	22.859	0.06
Glutamine	0.639	p < 0.01	1.127	0.154	2.950	9.8
Glycine	0.033	NS	0.664	0.196	1.817	30.9
Histidine	0.254	p < 0.05	0.153	0.035	0.537	1.23
1‐methyl Histidine	0.305	p < 0.05	0.003	ND	0.019
3‐methyl Histidine	0.414	p < 0.01	0.029	ND	0.221
Hydroxyproline	0.428	p < 0.01	0.048	0.008	0.176
Isoleucine	−0.192	NS	0.169	0.041	0.402	7.41
Leucine	−0.165	NS	0.351	0.106	0.870	6.45
Lysine	0.003	NS	0.355	0.055	0.973	0.71
Methionine	−0.081	NS	0.077	0.017	0.216	3.72
Ornithine	0.605	p < 0.01	0.206	0.009	0.991
Phenylalanine	−0.211	NS	0.142	0.030	0.377	6.61
Phosphoserine	−0.507	p < 0.01	0.572	0.082	1.966
Proline	0.099	NS	0.179	0.059	0.392	15.1
Serine	0.303	p < 0.05	0.326	0.114	0.291	20.9
Taurine	0.270	p < 0.05	4.881	0.552	23.861
Threonine	0.188	NS	0.201	0.064	0.398	25.7
Tryptophan	0.531	p < 0.01	0.928	0.021	4.768	2.29
Tyrosine	−0.261	p < 0.05	0.127	0.032	0.299
Valine	−0.153	NS	0.278	0.003	0.621	4.16
Anserine	−0.383	p < 0.01	1.104	ND	2.876
Carnosine	−0.559	p < 0.01	8.291	0.012	18.508
Total amino acids and dipeptides	0.526	p < 0.01	14.5	3.0	42.3

Note. Cysteine was not detected.

Mean, minimum, and maximum values were calculated from 63 values (21 muscle samples × 3 animals).

NS, not significant; ND, not detected.