Isolation and structural characterization of a non-competitive α-glucosidase inhibitory polysaccharide from the seeds of Litchi chinensis Sonn

In this study, a novel homogeneous polysaccharide (LSP-W-4, MW = 6.70 kDa) was isolated and purified from the seeds of Litchi chinensis Sonn. Monosaccharide composition analysis indicated that LSP-W-4 is a heteropolysaccharide consisting of arabinose, mannose, glucose and galactose in a molar ratio of 6.33:3.88:10.35:1.00. A detailed structural analysis revealed that LSP-W-4 has a backbone consisting of 1,4-α-Glcp and 1,4-β-Manp, as well as four...