Structural studies of a methyl galacturonosyl-methoxyxylan isolated from the stem of Lagenaria siceraria (Lau).
A water-soluble polysaccharide was isolated from the aqueous extract of the stem of Lagenaria siceraria. The polysaccharide was found to be constituted of methyl d-galacturonate, 2-O-methyl-D-xylose, and d-xylose in a ratio of 1:1:1. On the basis of total acid hydrolysis, methylation analysis, periodate oxidation, NMR studies ((1)H, (13)C, 2D-COSY, TOCSY, NOESY, HSQC, and HMBC), and MALDI-TOF MS analysis, the structure of the repeating unit of the polysaccharide is determined as.
Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, West Bengal, India.
Kaushik
K
Ghosh
Krishnendu
K
Chandra
Sadhan K
SK
Roy
Subhas
S
Mondal
Debabrata
D
Maiti
Debsankar
D
Das
Arnab K
AK
Ojha
Syed S
SS
Islam
D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010936:Plant Extracts; D010944:Plants / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry*; D012995:Solubility; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D014867:Water
D010936:Plant Extracts; D011134:Polysaccharides; D014867:Water