Three polysaccharides RATPW, RATPS1 and RATPS2 were purified and characterized.
RATPS2 showed significant DPPH and hydroxyl radical scavenging activity.
RATPW, RATPS1 and RATPS2 could protect the PC12 cells from H2O2 damage.
Both RATPW and RATPS2 had a potential to be a stimulant of immune response.