Amino acids	C. nitida		C. acuminata		G. kola
Amino acids	Total	Free	Total	Free	Total	Free
Aspartic acid	0.53 ± 0.28	0.53 ± 0.28	-	-	-	-
Arginine	1.06 ± 0.06	0.69 ± 0.06	0.86 ± 0.01	0.61 ± 0.01	0.61 ± 0.02	0.61 ± 0.02
Threonine^*	0.39 ± 0.01	-	0.33 ± 0.04	-	-	-
Alanine	0.50 ± 0.01	0.20 ± 0.01	0.42 ± 0.09	0.23 ± 0.07	0.28 ± 0.12	0.19 ± 0.00
Proline	0.83 ± 0.04	0.53 ± 0.04	1.83 ± 0.23	1.37 ± 0.23	0.10 ± 0.13	-
Valine^*	0.35 ± 0.01	-	0.30 ± 0.02	-	0.33 ± 0.08	-
Methionine^*	0.22 ± 0.00	-	0.48 ± 0.03	-	0.43 ± 0.26	-
Cysteine	0.27 ± 0.00	-	0.34 ± 0.01	-	0.19 ± 0.27	-
Lysine^*	0.30 ± 0.02	0.16 ± 0.02	0.30 ± 0.01	0.16 ± 0.00	0.31 ± 0.01	0.18 ± 0.13