<unk>  <unk>  is a protein-bound<unk>  extracted from the edible mushroom Coriolus versicolor.<unk>  is currently in the animal-testing phase of research in many countries for use as an anti-tumor drug. It appears to work as a biological response modifier (BRM), enhancing the body's own use of macrophages and T-lymphocytes, rather than directly attacking any tumors.<unk>  Krestin (PSK) was first isolated in Japan in the late 1960s while<unk>  was isolated about 1983 in China. Each compound has shown remarkable anticancer properties with few side effects. By 1987 PSK accounted for more than 25% of total national expenditure for anticancer agents in Japan.
Polysaccharide peptide
Polysaccharide-K
Galactooligosaccharide
Self-protein
Virulence factor
Delta-Palutoxin
Bacterial adhesin
Polymer-protein hybrid