| Characterisation of the arabinose-rich carbohydrate composition of immature and mature marama beans (Tylosema esculentum). | |
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MedLine Citation:
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PMID: 21543095 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Marama bean (Tylosema esculentum) is an important component of the diet around the Kalahari Desert in Southern Africa where this drought resistant plant can grow. The marama bean contains roughly 1/3 proteins, 1/3 lipids and 1/3 carbohydrates, but despite its potential as dietary supplement little is known about the carbohydrate fraction. In this study the carbohydrate fraction of "immature" and "mature" marama seeds are characterised. The study shows that the marama bean contains negligible amounts of starch and soluble sugars, both far less than 1%. The cell wall is characterised by a high arabinose content and a high resistance to extraction as even a 6M NaOH extraction was insufficient to extract considerable amounts of the arabinose. The arabinose fraction was characterised by arabinan-like linkages and recognised by the arabinan antibody LM6 and LM13 indicating that it is pectic arabinan. Two pools of pectin could be detected; a regular CDTA (1,2-diaminocyclohexane-N,N,N',N'-tetraacetic acid) or enzymatically extractable pectin fraction and a recalcitrant pectin fraction containing the majority of the arabinans, of which about 40% was unextractable using 6M NaOH. Additionally, a high content of mannose was observed, possibly from mannosylated storage proteins. |
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Authors:
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Minah M Mosele; Ase S Hansen; Søren B Engelsen; Jerome Diaz; Iben Sørensen; Peter Ulvskov; William G T Willats; Andreas Blennow; Jesper Harholt |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-5-2 |
Journal Detail:
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Title: Phytochemistry Volume: - ISSN: 1873-3700 ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-5-5 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0151434 Medline TA: Phytochemistry Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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Quality and Technology, Department of Food Science, Faculty of Life Sciences, University of Copenhagen, Rolighedsvej 30, 1958 Frederiksberg C, Denmark; Department of Extension and Training, National Food Technology Research Center, Mpuutsane Industrial Area, Private Bag 008, Kanye, Botswana. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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