
Carbohydrate Research p. 113 - 126 (1981)
Update date:2022-08-25
Topics:
Brasch, Donald J.
Chang, Hi Mui
Chuah, Chaw T.
Melton, Laurence D.
A galactan sulfate has been isolated from the seaweed Porphyra columbina, and its atructure established by a combination of methylation, methanolyais, treatment with alkali followed by methylation, and 13C-n.m.r. spectroscopy.The polysaccharide belongs to the porphyran class, and consists of 3-linked β-D-galactosyl residues and 4-linked α-L-galactosyl residues. 3,6-anhydro-L-galactose and L-galactose 6-sulfate residues total approxymately half of the sugar units, the other being made up of D-galactose residues.Some evidence is presented that suggest that the galactan sulfate does not have a completely alternating structure.
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(1920)