“…Many authors suggest that GalA, as a hydrogen donator, probably plays a key role in the scavenging of free radicals [ 16 , 17 ]. Hence, the HG domain may represent an active structural domain of pectin-mediating antioxidant activity [ 15 , 17 ]. However, some authors believe that its antioxidant activity is associated with RG-I [ 18 ], and [ 19 ] showed that antioxidant activity decreases with an increase in GalA content.…”