[Galactomannan from ambiguous Crazyweed (Oxytropis ambigua (Pall) DC)].
A galactomannan with a molecular weight of 735 kDa was first isolated and purified from seeds of ambiguous crazyweed Oxytropis ambigua (Pall) DC. (family Leguminosae) with a yield of 3.6%. Its aqueous solutions displayed an optical activity ([alpha]D = 73.32 degrees) and high viscosity ([eta] = 644 ml g-1). Chemical analysis and 13C-NMR spectroscopy revealed the presence in the heteropolysaccharide of D-mannopyranose and D-glucopyranose at a molar ratio of 1.39:1. The linear backbone of its macromolecule consists of 1.4-beta-D-mannopyranose residues. Single beta-D-galactose residues substitute 72% of mannoses to form branches.
Mestechkina
N M
NM
Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr., 33, Moscow, 117071 Russia.
Lobanova
I E
IE
Anulov
O V
OV
Shcherbukhin
V D
VD
D007887:Fabaceae / Q000737:chemistry*; D005690:Galactose / Q000031:analogs & derivatives; D009682:Magnetic Resonance Spectroscopy; D008351:Mannans / Q000737:chemistry / Q000302:isolation & purification*
D008351:Mannans; C012990:galactomannan; D005690:Galactose
Galaktomannan ostrolodochnika skhodnogo (Oxytrophis ambigua (Pall) DC).