| http://www.w3.org/ns/prov#value | - Naturally occuring phospholipids include phosphatidyl cholines, phosphatidyl serines, phosphatidyl inositols, phosphatidyl ethanolamines, diphosphatidyl glycerols and sphingomyelins which are obtainable from such natural sources as mammalian liver tissue, egg yolk, soybean etc.
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