Table 2: Amino acid composition of yellow maca cultivated in Xinjiang.

Amino acidsContent
mg/g protein
Essential amino
acid pattern
Chemical
score

Essential amino acid
Threonine32.74082
Valine65.050130
Methionine8.53524
Phenylalanine31.96053
Isoleucine36.64092
Leucine46.47066
Lysine50.45592

Nonessential amino acid contents
Aspartate82.8
Glutamate138.9
Serine25.4
Histidine27.5
Glycine43.1
Arginine202.3
Alanine39.4
Tyrosine22.8
Cysteine2.5
Proline0.5

(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).