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- W2023368689 abstract "Verbascose, the pentasaccharide of the raffinose family of oligosaccharides, consists of galactose units joined to sucrose. In pea (Pisum sativum) seeds, the content of verbascose is highly variable. In a previous study on a high-verbascose pea cultivar, the present authors have demonstrated that verbascose is synthesized by a multifunctional stachyose synthase (EC 2.4.1.67), which utilizes raffinose as well as stachyose as a galactosyl acceptor. Herein the results of a study of the cloning and functional expression of stachyose synthase from the low-verbascose genotype SD1 are reported and it is demonstrated that this line contains a protein with a reduced ability to synthesize verbascose. Analysis of seeds from seven pea lines revealed a positive correlation between verbascose synthase activity and verbascose content. Among these genotypes, only the SD1 line showed low verbascose synthase activity when the data were normalized to stachyose synthase activity. These results suggest that differences in the level of verbascose synthase activity could be caused by mutations in the stachyose synthase gene as well as by variation in the amount of the protein. The lines were also analysed for activity of α-galactosidase, a catabolic enzyme that could limit the extent of verbascose accumulation. No relationship was found between α-galactosidase activity and the amount of raffinose family oligosaccharides." @default.
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- W2023368689 date "2003-07-14" @default.
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- W2023368689 title "Enzymatic control of the accumulation of verbascose in pea seeds" @default.
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