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The galactan sulfates of the conchocelis phases of porphyra leucostricta and bangia atropurpurea


The galactan sulfates of the conchocelis phases of porphyra leucostricta and bangia atropurpurea



Journal of Experimental Botany 34(143): 705-711



ISSN/ISBN: 0022-0957

Galactan sulfates were extracted from mechanically isolated cell walls of laboratory cultured conchocelis phases of P. leucostricta and B. atropurpurea and their structure established by chemical methods and 13C-NMR spectroscopy. The polysaccharides represent an extreme structure for porphyran-type polymers in that they consist almost entirely of 3-linked .beta.-D-galactosyl residues alternating with 4-linked .alpha.-L-galactose-6-sulfate residues, the molar ratio of D to L units being .apprx. 1:1. 13C-NMR and GLC and paper chromatography gave no indication of 6-O-methyl-D-galactose in these polymers. Conchocelis galactans are chemically distinct from porphyrans of generic phases of Porphyra and Bangia.

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Accession: 006681068

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