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1H NMR of the purified end products of ulvan lyase. A, spectrum of the pure DP2. B and C are mixtures of the two ulvanobiuronic acids. The ratio of A:B ulvanobiuronic acid was ∼70:30 in B and 30:70 in A. D, spectra of the pure Δ-R3S-Xyl-R3Sα/β-tetrasaccharide.
