Alginate

Structural description

Alginic acid (algin, alginate) is a polysaccharide that is abundant in the cell walls of brown algae. (Pheophyceae, mainly laminariales and fucales) and in specific bacteria (acetylated form). Chemically, it is a linear copolymer with homopolymeric blocks of (1-4)-linked β-D-mannuronate (M) and its C-5 epimer α-L-guluronate (G) residues, respectively, covalently linked together in different sequences or blocks.

The monomers can appear in homopolymeric blocks of consecutive G-residues (G-blocks), consecutive M-residues (M-blocks), alternating M and G-residues (MG-blocks) or randomly organized blocks.

Activities and Uses

Alginates are widely used as waterproofing and fireproofing fabrics, as a gelling agent, for thickening drinks, ice cream and cosmetics, as a detoxifier that can absorb poisonous metals from the blood, as food additives (E number from E400 to E405), healthcare products (rheological properties)…

Alginates also show health benefits as dermal fibroblast Modulators and antitumoral as well.

Finally, the so called compounds are described as products intended for agriculture applications (Courtois, Current Opinion in Microbiology, 2009, 12:261–273).

Alginate

Alginate polysaccharides (from Laminaria j.)

Alginate polysaccharides (from Laminaria j.)
trait
ALG100

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Sodium salt alginates extracted and purified from brown seaweed Laminaria japonica
[9005-38-3]
Alginate

Alginate polysaccharides (from Durvillaea a.)

Alginate polysaccharides (from Durvillaea a.)
trait
ALG104

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Sodium salt alginates extracted and purified from
brown seaweed Durvillaea antarctica
[9005-38-3]
Alginate

Guluronate oligosaccharides average DP20

Guluronate oligosaccharides average DP20
trait
ALG300

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Oligosaccharides prepared by α(1-4) linked L-guluronate block hydrolysis. Sodium salt.
Average Degree of polymerization (DP):20.
M/G ratio<0.25
Alginate

Guluronate oligosaccharides average DP10

Guluronate oligosaccharides average DP10
trait
ALG310

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Oligosaccharides prepared by α(1-4) linked L-guluronate block hydrolysis. Sodium salt.
Average Degree of polymerization (DP): 10.
M/G ratio<0.25
Alginate

Guluronate oligosaccharides average DP5

Guluronate oligosaccharides average DP5
trait
ALG320

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Oligosaccharides prepared by α(1-4) linked L-guluronate block hydrolysis. Sodium salt.
Average Degree of polymerization (DP): 5.
M/G ratio<0.25
Alginate

Guluronate oligosaccharides Average DP3

Guluronate oligosaccharides Average DP3
trait
ALG330

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Oligosaccharides prepared by α(1-4) linked L-guluronate block hydrolysis. Sodium salt.
Average Degree of polymerization (DP): 3.
M/G ratio<0.30
Alginate

Mannuronate oligosaccharides average DP20

Mannuronate oligosaccharides average DP20
trait
ALG500

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Oligosaccharides prepared by β(1-4) linked D-mannuronate block hydrolysis. Sodium salt.
Average Degree of polymerization (DP): 20.
M/G ratio>4
Alginate

Mannuronate oligosaccharides average DP10

Mannuronate oligosaccharides average DP10
trait
ALG510

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Oligosaccharides prepared by β(1-4) linked D-mannuronate block hydrolysis. Sodium salt.
Average Degree of polymerization (DP): 10.
M/G ratio>4
Alginate

Mannuronate oligosaccharides average DP5

Mannuronate oligosaccharides average DP5
trait
ALG520

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Oligosaccharides prepared by β(1-4) linked D-mannuronate block hydrolysis. Sodium salt.
Average Degree of polymerization (DP): 5.
M/G ratio>4
Alginate

Mannuronate oligosaccharides DP3

Mannuronate oligosaccharides DP3
trait
ALG530

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Oligosaccharides prepared by β(1-4) linked D-mannuronate block hydrolysis. Sodium salt.
Average Degree of polymerization (DP): 3.
M/G ratio>4