The Composition Analysis of Maca (Lepidium meyenii Walp.) from Xinjiang and Its Antifatigue Activity

Table 2

Amino acid composition of yellow maca cultivated in Xinjiang.

Amino acids	Content; mg/g protein	Essential amino; acid pattern	Chemical; score
Essential amino acid
Threonine	32.7	40	82
Valine	65.0	50	130
Methionine	8.5	35	24
Phenylalanine	31.9	60	53
Isoleucine	36.6	40	92
Leucine	46.4	70	66
Lysine	50.4	55	92
Nonessential amino acid contents
Aspartate		82.8
Glutamate		138.9
Serine		25.4
Histidine		27.5
Glycine		43.1
Arginine		202.3
Alanine		39.4
Tyrosine		22.8
Cysteine		2.5
Proline		0.5

(a) Amino acid with “” means one of the essential amino acids; (b) Chemical score = (per gram of the amino acid contents in detected protein/per gram the amino acid contents in the essential amino acid pattern).