Chemistry of lipids fatty acids ppt BIOCHEMISTRY
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Chemistry of lipids fatty acids ppt BIOCHEMISTRY

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  • 1) fatty acids• The simplest with structural formula of R-COOH where R = hydrocarbon chain. • They differ from each other by the length of the tail, degree of unsaturation, and position of double bonds.
  • B. Essential Fatty AcidsAlthough most lipids required for cell structure, fuel storage, or hormone synthesiscan be synthesized from carbohydrates or proteins, we need a minimal level of cer-tain dietary lipids for optimal health. These lipids, known as essential fatty acids, arerequired in our diet because we cannot synthesize fatty acids with these particulararrangements of double bonds. The essential fatty acids -linoleic and -linolenicacid are supplied by dietary plant oils, and eicosapentaenoic acid (EPA) and docosa-hexaenoic acid (DHA) are supplied in fish oils. They are the precursors of theeicosanoids (a set of hormone-like molecules that are secreted by cells in small quan-tities and have numerous important effects on neighboring cells). The eicosanoidsinclude the prostaglandins, thromboxanes, leukotrienes, and other related compounds. C. Protein

Chemistry of lipids fatty acids ppt BIOCHEMISTRY Presentation Transcript

  • 1. Dr. Vijay Marakala, MBBS, MD. Assistant professor BIOCHEMISTRY SIMS & RC
  • 2. Fatty acids are carboxylic acids with hydrocarbon side chain R COOH
  • 3. Esterified • Esterified with various lipids • Common Free • FFA • Blood Occurrence
  • 4. D/U Total no of carbon atoms Even chain FA Odd chain FA D/U Length of hydrocarbon chain Short chain FA Medium chain FA Long chain FA Very long chain FA D/U Nature of hydrocarbon chain Saturated FA Unsaturated FA Branched chain FA Hydroxy FA
  • 5. Most of the fatty acids that occur in natural lipids are even carbons.
  • 6. Propionic acid • 3 Carbon Valeric acid • 5 Carbon Seen in milk and microbial cell walls
  • 7. In which hydrocarbon side chain is saturated (no double bonds).
  • 8. Monounsaturated FA • One double bond Polyunsaturated FA • 2 or more double bonds Subclassified according to number of double bonds
  • 9. Numbering of carbon atoms in FA Carboxyl endMethyl end Palmitic acid
  • 10. Nomenclature of Fatty Acids Saturated FA have both trivial names and systematic names.
  • 11. Nomenclature of Fatty Acids They have trivial names, systematic names, ω-end names and shorthand forms.
  • 12. Representation of double bonds of FA 2 systems 1. C- System 2. ω-or n- System Nomenclature of Fatty Acids
  • 13. 1. C-System 2. ω-or n-System
  • 14. ESSENTIAL FATTY ACIDS
  • 15. Functions of EFA 1.Synthesis of Ecosanoids 2.Maintenance of structural integrity of cells 3.Development of retina and brain 4.Antiatherogenic effect
  • 16. Thromboxanes Leukotrienes Prostaglandins
  • 17. EFA deficiency The syndrome in humans characterized by Horny eruptions on the posterior and lateral parts of limbs, on the back and buttocks. Dermatitis Poor wound healing Phrynoderma