Our most important conclusion is that there is a great deal of interplay between many forces in the determination of what lipids shall be present in a given cell at a given time. Function seems to be one of the more important of these, and there is reason to believe that the idea of function cannot be isolated from environmental considerations. The various forces that seem to be operating have been discussed in connection with specific details. The data do not yet permit quantitative statements about how these forces interact, so we restrict our specific conclusions to the following list.
KeywordsFatty Acid Ester Photosynthetic Bacterium Eukaryotic Alga Molecular Fossil Pentacyclic Triterpenoid
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