Form and function of arabinogalactans and arabinogalactan-proteins |
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Authors: | AE Clarke RL Anderson BA Stone |
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Institution: | 1. School of Botany, University of Melbourne, Parkville, Victoria 3052, Australia;2. Department of Biochemistry, La Trobe University, Bundoora, Victoria 3083, Australia |
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Abstract: | The occurrence, isolation, chemistry and physico-chemistry of plant arabino-3,6-galactans and arabino-3,6-galactan-proteins is reviewed. The structural relationships between arabino-3,6-galactans from gymnosperm wood, gum exudates of Acacia and other trees, and from plant callus cells and whole tissues are discussed. The nature of these proteoglycans is compared with the arabinose and galactose containing cell wall glycoproteins. Interactions of the arabino-3,6-galactan proteoglycans with carbohydrate binding proteins and with Yariv antigens are described. The utility of these reactions for both cellular and subcellular localization of the proteoglycans is discussed. The possible biological roles of the arabinogalactans and the arabinogalactan-proteins are reviewed. |
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Keywords: | higher plants arabinogalactans gum exudates proteoglycans glycoproteins lectins hydroxyproline cell walls Yariv antigen |
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