Coriolus Ultra is a mixture of two strains of Trametes Versicolor, the CM-101 strain from Japan and the COV-1 strain from China. These are the two strains used in the production of PSK and PSP. Coriolus Gold contains approx. 25% of a blend of PSK and PSP. PSK is a protein polysaccharide consisting of a beta-glucan β-1,4 main chain with β-1,3 and β-1,6 side chains. The approximate molecular weight of PSK is 100,000 Da, and the protein component is reported at the β-1,6 side chain.[5] PSK is isolated from the "CM-101" strain of Trametes versicolor. The analogous compound PSP, is derived from the "COV-1" strain of Trametes versicolor.[6]
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