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Indian Journal of Chemistry -Section B (IJC-B) >
IJC-B Vol.46B [2007] >
IJC-B Vol.46B(03) [March 2007] >
| Title: | HPAEC and MALDI-TOF-MS analysis of oligosaccharides generated from sesame meal by enzymatic hydrolysis |
| Authors: | Chattopadhyay, Kaushik
Ghosh, Partha
Ghosal, Pradyot
Ray, Bimalendu |
| Keywords: | Sesame meal
Enzyme hydrolysis
Oligosaccharides
GC
GC-MS
MALDI-TOF-MS
HPAEC |
| Issue Date: | Mar-2007 |
| Publisher: | CSIR |
| IPC Code: | Int.Cl.⁸ C07C |
| Abstract: | Polysaccharides obtained from depectinated sesame meal by extraction with 1M KOH (1OH) have been fractionated by anion exchange chromatography yielding a neutral xyloglucan rich population (1OHaq). Size exclusion chromatography of 1OHaq has resulted in one peak between Kav 0.3 to 0.6, corresponding to an apparent molecular weight of 85 ± 25 kDa. The structure of xyloglucan has been investigated by enzyme degradation with endo-(1→4)-β-D-cellulase followed by analysis of the resulting fragments by chemical methods as well as high performance anion exchange chromatography (HPAEC) and matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF-MS). The result shows that the xyloglucan present in 1OHaq fraction contains hexa(1)-, hepta(2)-, octa(3)-, nona(4,5)- and deca(6)-saccharides as the building sub-units. Hydrolysis of 4M KOH extracted material (4OH) with endo-β-(1→4)-D-xylanase and analysis of the derived oligosaccharides shows that sesame meal xylan is composed of a β-(1→4)-linked-D-xylopyranose backbone substituted with 4-O-methyl-D-glucuronic acid residue. |
| Page(s): | 471-477 |
| ISSN: | 0376-4699 |
| Source: | IJC-B Vol.46B(03) [March 2007]
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