IN-VIVO CONVERSION OF 6-O-SULFO-L-GALACTOPYRANOSYL RESIDUES INTO 3,6-ANHYDRO-L-GALACTOPYRANOSYL RESIDUES IN GRACILARIA-CHILENSIS BIRD, MCLACHLAN ET OLIVEIRA
Ja. Hemmingson et al., IN-VIVO CONVERSION OF 6-O-SULFO-L-GALACTOPYRANOSYL RESIDUES INTO 3,6-ANHYDRO-L-GALACTOPYRANOSYL RESIDUES IN GRACILARIA-CHILENSIS BIRD, MCLACHLAN ET OLIVEIRA, Carbohydrate research, 296, 1996, pp. 285-292
The agar polysaccharides of the red seaweed Gracilaria chilensis Bird,
McLachlan et Oliveira were labelled with the stable isotope C-13 by p
ulse feeding (NaHCO3)-C-13 to samples of this alga acclimatised to ind
oor culture. C-13 NMR spectroscopy of the labelled polysaccharides ext
racted from these samples has been used to demonstrate conversion in v
ivo of 6-O-sulfo-L-galactopyranosyl residues into 3,6-anhydro-L-galact
opyranosyl residues. The 6-O-sulfo-L-galactopyranosyl residues can be
linked to either 6-O-methyl-D-galactopyranosyl residues or D-galactopy
ranosyl residues. (C) 1996 Elsevier Science Ltd.