The Chemical Reactions and Pathways Involving Lipids Compounds Soluble in an Organic Solvent But Not or Sparingly in an Aqueous Solvent. Includes Fatty Acids; Neutral Fats Other Fatty Acid Esters and Soaps; Long Chain (fatty) Alcohols and Waxes; Sphingoids and Other Long Chain Bases; Glycolipids Phospholipids and Sphingolipids; and Carotenes Polyprenols Sterols Terpenes and Other Isoprenoids.
The Chemical Reactions and Pathways Resulting in the Formation of a Fatty Acid Any of the Aliphatic Monocarboxylic Acids That Can Be Liberated by Hydrolysis From Naturally Occurring Fats and Oils. Fatty Acids Are Predominantly Straight Chain Acids of 4 to 24 Carbon Atoms Which May Be Saturated or Unsaturated; Branched Fatty Acids and Hydroxy Fatty Acids Also Occur and Very Long Chain Acids of Over 30 Carbons Are Found in Waxes.
Catalysis of the Cleavage of C C C O C N and Other Bonds by Other Means Than by Hydrolysis or Oxidation or Conversely Adding a Group to a Double Bond. They Differ From Other Enzymes in That Two Substrates Are Involved in One Reaction Direction But Only One in the Other Direction. When Acting On the Single Substrate a Molecule Is Eliminated and This Generates Either a New Double Bond or a New Ring.