Uronic acid sequence in alginate from different sources
| Autor: | Arne Haug, Bjørn Larsen, Olav Smidsrød |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
Partial hydrolysis
Chromatography biology Chemistry Organic Chemistry Sequence (biology) General Medicine Uronic acid biology.organism_classification Biochemistry Analytical Chemistry Brown algae chemistry.chemical_compound Mannuronic acid Extracellular Organic chemistry Composition (visual arts) Bacteria |
| Zdroj: | Carbohydrate Research. 32:217-225 |
| ISSN: | 0008-6215 |
| DOI: | 10.1016/s0008-6215(00)82100-x |
| Popis: | Alginate may be considered as a block co-polymer of D -mannuronic and L -guluronic acids, and consists of three types of blocks: homopolymeric blocks of mannuronic acid (MM) and of guluronic acid (GG), and blocks with an alternating sequence (MG). The block composition of alginates has been characterized by a simple chemical method involving partial hydrolysis with acid, followed by fractional precipitation of the acid-resistant part of the alginate. Alginates from eleven different species of brown algae have been examined and, for five species, alginates from different tissues have been compared. The results indicate that young tissue is rich in MM blocks, and that the difference between the alginates from different species is mainly due to the alginates from the older parts of the plants. Extracellular alginates from two types of bacteria have been examined. |
| Databáze: | OpenAIRE |
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