Optimization and Identification of Antioxidant Peptide from Underutilized Dunaliella salina Protein: Extraction, In Vitro Gastrointestinal Digestion, and Fractionation

Table 2

The yield, DPPH• scavenging rate of different peptide fractions.

Peptide fraction (Da)	Peptide yields (%)		DPPH• scavenging rate (%)
	Non-digestion	Digested	Non-digestion	Digested
100-500	5.2 ± 0.3	5.7 ± 0.7	65.3 ± 8.5	35.2 ± 3.1
500-1000	4.9 ± 1.1	20.9 ± 2.1	34.3 ± 2.9	81.2 ± 4.0
1000-3000	6.4 ± 0.5	9.1 ± 0.8	39.6 ± 6.3	45.5 ± 3.7