Ij. Miller et Rh. Furneaux, THE STRUCTURAL DETERMINATION OF THE AGAROID POLYSACCHARIDES FROM 4 NEW-ZEALAND ALGAE IN THE ORDER CERAMIALES BY MEANS OF C-13 NMR-SPECTROSCOPY, Botanica marina, 40(4), 1997, pp. 333-339
The structures of agaroid polysaccharides from four New Zealand seawee
ds were determined primarily by means of C-13 NMR spectroscopy. The fo
llowing substitutions occurred at the primary hydroxyls of the 3-linke
d residues: Euptilota formosissima, total substitution by methyl ether
; Streblocladia glomerulata, total substitution by sulfate ester; Poly
siphonia strictissima, mainly substitution by sulfate ester; Polysipho
nia abscissoides, 70% substitution by sulfate ester, approximately 11%
by methyl ether. The natural polymers of Euptilota formosissima, Stre
blocladia glomerulata, and Polysiphonia abscissoides also contained L-
galactosyl-6-sulfate residues at between 10-20% levels that were conve
rted to 3,6-ahydrogalactosyl residues by alkali treatment, while that
from Polysiphonia strictissima appeared to contain 4-linked-L-galactos
yl residues, and also xylosyl residues at levels detectable by NMR spe
ctroscopy.