#phospholipid  any of various compounds composed of fatty acids and phosphoric acid and a nitrogenous base; an important constituent of membranes
  supertype:  lipid__lipide__lipoid  any oily organic compound insoluble in water but soluble in organic solvents; essential structural component of living cells (along with proteins and carbohydrates)
  substance of:  tissue_layer
  subtype:  lecithin  a yellow phospholipid essential for the metabolism of fats; found in egg yolk and in many plant and animal cells; used commercially as an emulsifier

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