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The amphibian Xenopus tropicalis appears an increasingly appealing model for both genetic and developmental biology studies, compared to the related species Xenopus laevis. Study of the glycosylation pattern of its secreted glycoproteins revealed that this species synthesizes large amounts of Lewis a epitope, whereas this motif has previously only been identified in animals within the primate...
The structures of two sulfated octasaccharides and one sulfated nonasaccharide isolated from human milk have been investigated. Using 13 C and 1 H NMR spectroscopy and ESMS, the following structures 1-3 were established:
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