*2.2. Composition of Amino Acid in OPs*

According to the data from the automatic analyzer, the content of total amino acids in OPs was 33.73 g/100 g (Table 2). The content of essential amino acids in OPs was 11.82 g/100 g and accounted for 35.04% of the total amino acids. The content of hydrophobic amino acids was 12.76 g/100 g and accounted for 37.83% of the total amino acids. OPs were rich in Glutamic acid (Glu, 4.33 g/100 g), Aspartic acid (Asp, 3.36 g/100 g), Alanine (Ala, 2.63 g/100 g), Proline (Pro, 2.61 g/100 g), and Lysine (Lys, 2.61 g/100 g).

**Table 2.** Composition and content of amino acids in OPs.


Note: \* Essential amino acids. # Hydrophobic amino acids.
