期刊
CARBOHYDRATE RESEARCH
卷 337, 期 5, 页码 433-440出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0008-6215(02)00009-5
关键词
kappa-carrageenam; Kappaphycus striatum; NMR data; oligosaccharides
资金
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM038060] Funding Source: NIH RePORTER
- NIGMS NIH HHS [GM38060] Funding Source: Medline
Oligosaccharides were prepared through mild hydrochloric acid hydrolysis of K-carrageenan from Kappaphycus striation carrageenan. Three oligosaccharides were purified by strong-anion exchange high-performance chromatography. Their structure was elucidated using mass spectral and NMR data. Negative-ion electrospray ionization (ESI) mass spectra at different fragmentor voltages provided the molecular weight of the compounds and unraveled the fragmentation pattern of the K-carrageenan oligosaccharides, 2D NMR techniques. including H-1-H-1 COSY, H-1-H-1 TOCSY and C-13-H-1 HMQC. were performed to determine the structure of a trisulfated pentasaccharide. 1D NMR and ESIMS were used to determine the structures of a K-carrageenan-derived pentasaccharide. heptasaccharide. and an undecasaccharide. All the oligosaccharides characterized have a 4-O-sulfo-D-galactopyranose residue at both the reducing and nonreducing ends. (C) 2002 Elsevier Science Ltd. All rights reserved.
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