Amino acid score of animal foods –
Amino acid score (chemical score)

It is used for qualitative assessment of protein.
It is a measure of the concentration of each essential amino acid in the test protein expressed as a percentage of that amino acid in reference protein (egg protein).

Amino acid score = No. of mg of one amino acid per gm of protein / No. of mg of same amino acid per gm of egg protein x 100

The amino acid score is between 50 and 60 for starches and 70-80 for animal foods.
40–50
50–60
70–80
90–100