The chemical structure of galactomannan isolated from seeds of Delonix regia.
A galactomannan isolated from seeds of Delonix regia was investigated. The specific rotation of the galactomannan was +15 degrees at 25 degrees C. The molecular mass of the galactomannnan was estimated to be 2.5 x 10(5). The ratio of D-mannose to D-galactose was estimated approximately to be 4.0:1.0 by HPLC and (1)H-NMR. NMR ((1)H and (13)C) spectra, and methylation analysis of the galactomannan indicated that it was composed of 1,4-linked beta-D-mannose, 1,4,6-linked beta-D-mannose, and terminal alpha-D-galactose. It was composed of pentasaccharide repeating-units, the chemical structure of which is proposed below.
Tamaki
Yukihiro
Y
Department of Subtropical Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa, Japan.
Teruya
Takeshi
T
Tako
Masakuni
M
D002849:Chromatography, Gas; D007887:Fabaceae / Q000737:chemistry*; D005690:Galactose / Q000031:analogs & derivatives; D009682:Magnetic Resonance Spectroscopy; D008351:Mannans / Q000737:chemistry* / Q000302:isolation & purification*; D012639:Seeds / Q000737:chemistry*
D008351:Mannans; C012990:galactomannan; D005690:Galactose