Table 7. Optimal inclusion of dietary taurine for specific plasma amino acids determined by the regression models

Regression models	Phospho-serine	Taurine	Threo-nine	Serine	Glutamicacid	Glycine	Alanine	Valine	Cystine	Methio-nine	Leucine	Tyrosine	Phenylalanine	GABA
One-slope broken-line	0.991)	1.70	1.62	NA	0.94	1.11	NA	NA	2.02	1.91	NA	0.641)	1.02	NA
Two-slope broken-line	NA2)	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Quadratic broken-line	NA	1.84	1.041)	0.941)	0.941)	0.991)	NA	2.011)	1.971)	0.991)	0.971)	NA	0.961)	0.941)
Quadratic	NA	2.151)	2.25	NA	NA	2.17	1.711)	NA	NA	NA	NA	NA	NA	NA

The values represent the preferred values based on calculation of model selection criterion, including the Akaike information criterion corrected (AICc) and the adjusted R-squared values.
Not applicable due to the non-significance of the regression estimation coefficients of the corresponding models.
GABA, gamma-aminobutyric acid.