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).