Carrageenan, polysaccharides types

N 137 "Conformational Analysis of Polysaccharides, Part II. Alternating Copolymers of the Agar-Carrageenan-Chondroitin type by Model Building in the... 

A. K. Sen, Sr., A. K. Das, K. K. Sarkar, A. K. Siddhanta, R. Takano, K. Kamei, and S. Hara, An agaroid-carrageenan hybrid type backbone structure for the antithrombotic sulfated polysaccharide from Grateloupia indica Boergensen (Halymeniales, Rhodophyta), Bot. Mar., 45 (2002) 331—338. 

The algal polysaccharides resembled the relatively simplified structures of tile neutral mucilages, as in the case of carrageenan A wider spectrum of struclures is found in Ihc bacterial gums, which arc generally of the highly branched type exuded by higher plants,... 

In the field of natural red algal galactans, MS was used for the first time in the structural analysis of odonthalan.353 Galactose and 6-O-methylgalactose, the hydrolysis products of the polysaccharide, were separated by column chromatography and identified by MS in the form of their di-O-isopropylidene derivatives. Cyclic derivatives of this type had been shown previously to be especially suitable for mass-spectrometric characterization of the structure and (in certain instances) stereochemistry of monosaccharides.349,354 A combination of GLC and MS was also used for identification of methyl 4.6-O-0 -methoxycarbonylethylidene)-D-galactosides (as their trifluoroacetates) in the methanolysis products of Ji-carrageenan from Petrocelis middendorfii,355... 

M. K. Fatema, H. Nonami, D. R. B. Ducatti, A. G. Gonqalves, M. E. R. Duarte, M. D. Noseda, A. S. Cerezo, R. Erra-Balsells, and M. C. Matulewicz, Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry analysis of oligosaccharides and oligosaccharide alditols obtained by hydrolysis of agaroses and carrageenans, two important types of red seaweed polysaccharides, Carbohydr. Res., 345 (2010) 275-283. 

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