Relatively little has yet been reported on the composition of the fatty materials from the mycelium of mycrobes, except special ones, fatty yeasts and acid-fast bacilli. Especially previous investigations of the fatty materials of fungus tissue have been limited mainly to yeasts and to the higher fungi. In 1929, Tanaka described the constituents of the fat extracted from Aspergillus oryzae. Peterson and his coworkers, in 1934, studied the fat extracted from Aspergillus sydowi. Also, in 1934, Ward and Jamieson found the composition of the fat from Penicllium javanicum.
In previous investigations the fatty material contents of some strains of Penicillium notatum, Penicillium chrysogenum, which had produced penicillin, have been determined, and one of fat constituents, ergosterol has been isolated and identified. At the same time, the chemical characteristics of the fat from Penicillum notatum B21 was dealed in the paper.
In the present work, chemical constituents of fatty materials of one of these molds, Penicillium chrysogenum Q176 hove been examined in detail, and the connection with other mycrobes have been studied in the view of fatty constituents.
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