The carrageenans of gigartina skottsbergii s. et g. Part III. methylation analysis of the fraction precipitated with 0.3-0.4m potassium chloride
The fraction of carrageenan from the red seaweed Gigartina skottsbergii that is precipitated with 0.3-0.4m potassium chloride has been studied by methylation analysis. The results agree qualitatively with the structure previously suggested, except that 3-linked D-galactose 4-sulfate residues are pre...
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1973
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v26_n2_p335_Cerezo http://hdl.handle.net/20.500.12110/paper_00086215_v26_n2_p335_Cerezo |
| Aporte de: |
| Sumario: | The fraction of carrageenan from the red seaweed Gigartina skottsbergii that is precipitated with 0.3-0.4m potassium chloride has been studied by methylation analysis. The results agree qualitatively with the structure previously suggested, except that 3-linked D-galactose 4-sulfate residues are present rather than the corresponding 2-sulfate. For every ten D-galactose residues linked at C-3, there are, on the average, six residues of 3,6-anhydro-D-galactose linked at C-4 and ten sulfate groups (five as 3,6-anhydro-D-galactose 2-sulfate and five as D-galactose 4-sulfate residues). © 1973. |
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