Polyuronids

Polyuronides are polysaccharides which contain uronic acids , e.g. B. D - mannuronic acid , D - galacturonic acid or D - glucuronic acid . The uronic acids are always in pyranose form and give the macromolecules an acidic character and the ability to store water and thus to form a gel .

Gelling pectins , alginic acids and many mucilages are among the plant polyuronides. Polyuronides are also found in the exopolysaccharide layer or mucous capsule (see periplasmic space ) of some bacteria , for example in Pseudomonas aeruginosa or Azotobacter vinelandii .

literature

• Jeremy M. Berg, John L. Tymoczko, Lubert Stryer : Biochemistry. 6 edition, Spektrum Akademischer Verlag, Heidelberg 2007. ISBN 978-3-8274-1800-5 .
• Donald Voet, Judith G. Voet: Biochemistry. 3rd edition, John Wiley & Sons, New York 2004. ISBN 0-471-19350-X .
• Bruce Alberts , Alexander Johnson, Peter Walter, Julian Lewis, Martin Raff, Keith Roberts: Molecular Biology of the Cell , 5th Edition, Taylor & Francis 2007, ISBN 978-0815341062 .

Individual evidence

1. ↑ Hans-Dieter Jakubke, Ruth Karcher (coordinators): Lexicon of Chemistry in three volumes, Spektrum Verlag, Heidelberg, Volume 3, 1999, ISBN 3-8274-0381-2 , p. 91.