NUTR 3070 Lecture Notes - Lecture 6: Trans Fat, Palatability, Organelle
22 Jan 2020
School
Department
Course
Professor
Document Summary
Lipids: soluble in organic solvents, wide variety of structures and functions, source of energy, major component of cell and organelle membranes. Saturated: max number of h atoms, only single bonds. Unsaturated: missing h bonds, double bonds, monounsaturated, polyunsaturated, cis or trans configuration. Delta system ( ) numbering starts from carboxyl end of fatty acid. Omega system ( ) numbering system starts from methyl end of fatty acid. Dogs can convert ala to epa, but not dha (require dha in their diet) Cats lack enzymes to make any long chain fatty acids (required in their diet) Desaturation = insert double bonds, remove 2 hydrogens. Types of lipids: eicosanoids, 20 carbon metabolites of aa and epa, produced by most cells in the body, hormone-like function locally, role in inflammation, platelet aggregation, blood pressure, etc. Features: more polar than tags, due to hydrophilic phosphate head group, components of membranes, source of physiologically active fatty acids for eicosanoid synthesis, anchors membrane proteins.
