Table 5.

Component loadings matrix for the first three factors and the variance explained by each amino acid.

Amino acid	Principal component
	PC1	PC2	PC3
Asp	0.295	0.059	0.576
Ser	0.959	0.165	0.087
Glu	0.341	−0.032	0.752
Gly	0.179	0.902	−0.095
His	0.592	0.733	0.066
Arg	0.840	0.210	0.156
Thr	0.056	0.842	0.112
Ala	0.864	0.110	0.055
Pro	0.913	0.087	0.175
Tyr	0.854	0.161	0.205
Val	0.671	0.103	0.470
Lys	0.862	0.101	−0.229
Ile	0.721	0.169	0.270
Leu	0.900	0.256	0.186
Phe	0.890	0.194	0.163
Trp	−0.462	0.017	0.728
Variance (%)	50.334	14.595	12.305
Cumulative variance (%)	50.334	64.929	77.234

PC: Principal component.