TY - JOUR
T1 - Further studies on the structure of polysaccharides from the lichen Flavoparmelia caperata (L.) Hale
AU - Takeda, Tadahiro
AU - Shimizu, Noriko
AU - Watanabe, Sachiko
AU - Edagawa, Yoshikuni
AU - Ito, Yoshihisa
AU - Narui, Takao
AU - Shibata, Shoji
PY - 2003/12/1
Y1 - 2003/12/1
N2 - A water-soluble polysaccharide called PC-2 was previously isolated from Flavoparmelia caperata (L.) Hale and assigned to α(1-3)(1-4)glucan. However, PC-2 separated into three components, PC-2A, PC-2B, and PC-2C (a single peak in HPLC, respectively) on further purification. Methylation analysis and 1H- and 13C-NMR spectroscopic studies suggested that PC-2A is composed of repeating units of [α-D-Glc1-3]3, : [α-D-Glc1-4]2, while PC-2B and PC-2C are partly branched galactoglucomannans consisting of (1-3)- and (1-4)-linked α-D- glucopyranosyl units as the main chain. In addition we confirmed that the polysaccharide fraction PB-2 from the lichen of the same genus, Flavoparmelia baltimorensis (Gyelnik & Foriss) Hale, is identical to PC-2 based on the chemical and spectroscopic data.
AB - A water-soluble polysaccharide called PC-2 was previously isolated from Flavoparmelia caperata (L.) Hale and assigned to α(1-3)(1-4)glucan. However, PC-2 separated into three components, PC-2A, PC-2B, and PC-2C (a single peak in HPLC, respectively) on further purification. Methylation analysis and 1H- and 13C-NMR spectroscopic studies suggested that PC-2A is composed of repeating units of [α-D-Glc1-3]3, : [α-D-Glc1-4]2, while PC-2B and PC-2C are partly branched galactoglucomannans consisting of (1-3)- and (1-4)-linked α-D- glucopyranosyl units as the main chain. In addition we confirmed that the polysaccharide fraction PB-2 from the lichen of the same genus, Flavoparmelia baltimorensis (Gyelnik & Foriss) Hale, is identical to PC-2 based on the chemical and spectroscopic data.
KW - Flavoparmelia baltimorensis
KW - Flavoparmelia caperata
KW - α(1-3)(1-4)glucan (3 : 2)
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U2 - 10.1248/cpb.51.1436
DO - 10.1248/cpb.51.1436
M3 - Article
C2 - 14646326
AN - SCOPUS:3142772244
VL - 51
SP - 1436
EP - 1438
JO - Chemical and Pharmaceutical Bulletin
JF - Chemical and Pharmaceutical Bulletin
SN - 0009-2363
IS - 12
ER -