Amino acid	Minimum concentration in Exo (μmol/g protein)	Maximum concentration in Exo (μmol/g protein)	Intracellular concentration obtained from previous studies (assuming 20% protein) (μmol/g protein)	References
Glutamate	30.8294	585.3429	185	(Fan et al., 2013)
			114.75	(Baydoun et al., 1990)
Phe	3.5357	223.7338	3.8	(Baydoun et al., 1990)
			3.9	(Hansen and Emborg, 1994)
Alanine	39.4691	191.3612	14.75	(Baydoun et al., 1990)
Glycine	60.8029	168.6407	31.35	(Baydoun et al., 1990)
			41.8	(Hansen and Emborg, 1994)
Tryptophan	44.5964	51.182	7.8	(Baydoun et al., 1990)
Asparagine	49.7664	133.0117	93.35	(Hansen and Emborg, 1994)
Leu	10.3048	174.2312	6.2	(Baydoun et al., 1990)
Valine	90.0222	196.799	6.15	(Baydoun et al., 1990)
Lys	24.4519	78.5565	5.4	(Baydoun et al., 1990)
Gln	462.8079	1693.0858	100	(Souba, 1993)