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The molecule laminarin (also known as laminaran) is a storage glucan (a polysaccharide of glucose) found in brown algae. It is used as a carbohydrate food reserve in the same way that chrysolaminarin is used by phytoplankton, especially in diatoms.[1] It is created by photosynthesis and is made up of β(1→3)-glucan with β(1→6)-branches. It is a linear polysaccharide, with a β(1→3):β(1→6) ratio of 3:1.[2] Its hydrolysis is catalyzed by enzymes such as laminarinase (EC that breaks the β(1→3) bonds.[3]

Other names
3D model (JSmol)
ECHA InfoCard 100.029.726
EC Number 232-712-4
Molar mass Variable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references


  1. ^ Beattie A, Hirst EL, Percival E (June 1961). "Studies on the metabolism of the Chrysophyceae". Biochem. J. England. 79: 531–537. PMC 1205682. PMID 13688276.
  2. ^ Nisizawa K, Yamaguchi T, Handa N, Maeda M, Yamazaki H (November 1963). "Chemical nature of a uronic acid-containing polysaccharide in the peritrophic membrane of the silkworm". Journal of Biochemistry. Japan: Oxford University Press for Japanese Biochemical Society. 54: 419–426. ISSN 0021-924X. PMID 14089735.
  3. ^ Salyers AA, Palmer JK, Wilkins TD (May 1977). "Laminarinase (beta-glucanase) activity in Bacteroides from the human colon". Appl Environ Microbiol. England. 33 (5): 1118–1124. PMC 170836. PMID 879772.