Crude glutenin of four commercial wheat varieties viz. C 306, HI 977, HW 2004 and PBW 550 of diverse origin and breadmaking quality were fractionated by size-exclusion chromatography into three fractions of decreasing molecular weights. The relative quantity of peak II, containing LMW-GS specifically, varied considerably among the varieties as reflected from their discrete SEC profiles. The area % of peak II, containing protein of interest, was maximal for C 306 (22.08%) followed by PBW 550 (15.86%). The least proportion of LMW-GS were recovered from variety HW 2004 (9.68%). As the concentration of the sample extract injected to the column increased, the resolution of the peak declined in association with the slight shifting of retention time to the higher values. The best results were obtained for variety C 306 at 100 mg protein concentration with 3 M urea buffer. Consequently, the optimized conditions for purification of LMW-GS in appreciable amounts using SEC were established.
Journal of Food Science and Technology – Springer Journals
Published: Jan 12, 2018
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