Masami Soneda

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Prototheca wickerhamii is a ubiquitous green alga that does not have chlorophyll. It is widely present in the environment but is a cause of a rare opportunistic infection in humans and livestock known as protothecosis.

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Phaffia is a genus of fungi in the order Cystofilobasidiales. The genus comprises orange-red yeasts that form basidia directly from yeast cells, lack hyphae throughout their life cycle, and produce astaxanthin, a carotenoid used as an additive in animal feed to enhance colour in shrimp, salmon, and poultry eggs and also as an antioxidant in dietary supplements. The genus was named after the Dutch specialist Herman Phaff who first isolated the type species from slime fluxes of Japanese and North American trees in the 1960s. The genus Xanthophyllomyces was proposed for the teleomorphic

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