The Effect of Germination on Antioxidant and Nutritional Parameters of Protein Isolates from Grass Pea (Lathyrus sativus) Seeds
2010
Starzyńska-Janiszewska, A. | Stodolak, B. | Mickowska, B.
The aim of this research was to study the antioxidant and nutritional (selected objects) properties of protein isolates obtained from grass pea seedlings as compared with soaked and raw seeds. Two percent extract of isolate from 5-day-old seedlings showed the highest total antioxidant activity (25%) and the ability to chelate Fe ²⁺ (2.35 mg/g d.m.) as compared with other isolates. Protein isolates from grass pea seeds had on average 89% total protein, 87% in vitro protein bioavailability, about 5574 TIU/g (d.m.) (trypsin inhibitors activity) and did not contain ODAP. Germination of seeds for 5 days considerably improved the in vitro bioavailability of isolates, by 12%, and profile of sulfur amino acids by 42%, in comparison with isolates obtained from the raw seeds. Isolates from 5-day-old grass pea seedlings had the best antioxidant properties and improved nutritional parameters (as compared with raw seeds), which makes them worthy of being considered as a potential food additive.
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