of ergosterol which can be converted to vitamin D2 upon exposure to ultraviolet light. Yeasts The yeast Saccharomyces is used industrially to produce the amino acid lysine, as well as recombinant proteins insulin and hepatitis B surface antigen. Transgenic yeasts are used to produce artemisinin, as well as insulin analogs. Candida is used industrially to produce vitamins ascorbic acid and riboflavin. Pichia is used to produce the amino acid tryptophan and the vitamin pyridoxine. Rhodotorula is used to produce the amino acid phenylalanine. Moniliella is used industrially to produce the sugar alcohol erythritol. References External links Memorial Sloan-Kettering Agaricus subrufescens, Phellinus linteus, Ganoderma lucidum, Trametes versicolor and PSK, Grifola frondosa, Inonotus obliquus, Pleurotus ostreatus, Cordyceps, Shiitake, Lentinan, AHCC. American Cancer Society Trametes versicolor and PSK, Grifola frondosa , Shiitake . National Cancer Institute Shiitake, Lentinan, Cordycepin Chemotherapy Cancer Antibiotics Immunosuppressants Antifungals Antiparasitic agents