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Spermidine synthase (EC 2.5.1.16) was purified to homogeneity for the cytosol of soybean (Glycine max) axes using ammonium sulfate fractionation and chromatography on DEAE-Sephacel, Sephacryl S-300, ω-aminooctyl-Sepharose and ATPA-Sepharose. The molecular mass of the enzyme estimated by gel filtration and SDS-PAGE is 74 kDa. Cadaverin and 1,6-diaminohexane could not replace putrescine as the aminopropyl...
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