Arabinan and arabinan-rich pectic polysaccharides from quinoa (Chenopodium quinoa) seeds: Structure and gastroprotective activity

► Cell wall polysaccharides of seeds of quinoa (Chenopodium quinoa) were studied. ► Quinoa has a linear arabinan with (1 → 5)-linked α-l-arabinofuranosyl units. ► Quinoa has a rhamnogalacturonan with a branched arabinan and galactan side-chains. ► The polysaccharides showed gastroprotective activity.