Abstract
A derivative of Lactobaccillus casei ATCC 7469, characterized by limited growth in liquid media and an unusual phospholipid composition, has been isolated. Grown to early stationary phase on a lipid-free and inositol-free medium, the organism produces phosphatidylinositol, phosphatidylglycerol, and diphosphatidylglycerol. The phosphatidylinositol was identified by thinlayer, paper, and gas chromatography, and by mass spectrometry. In agreement with published data, the conventional strain produced phosphatidylglycerol, diphosphatidylglycerol, and lysylphosphatidylglycerol, but no phosphatidylinositol. The phospholipid/glycolipid molar ratio, calculated on the basis of published glycolipid analyses, is 1.3: 1 for the derivative and 1.5: 1 for the conventional strain.
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