Novel polysaccharide and radioprotective agent containing the same as active ingredient

摘要

A polysaccharide containing arabinose, galactose, glucose, rhamnose, galacturonic acid and glucuronic acid as the constituent sugars each in an amount of 1 mole % or above and having a molecular weight of 5 x 10<4> to 1 x 10<6>. The polysaccharide has the effect of improving a hematopoietic function and serves as a radioprotective agent for treating or preventing radiation injury.