BIOCHEM WEEK 4 Flashcards
• Fats
• Insoluble in water
• Soluble in nonpolar organic solvents
• Wide structural diversity
• Can be classified based on biochemical function
Lipids
Classification of Lipids
BASED ON FUNCTION
• triacylglycerols
Energy storage
Classification of Lipids
BASED ON FUNCTION
• phospholipids
• sphingoglycolipids,
• cholesterol
Membrane component
Classification of Lipids
BASED ON FUNCTION
• bile acids
Emulsification
Classification of Lipids
BASED ON FUNCTION
• steroid hormones,
• eicosanoids
Messenger
Classification of Lipids
BASED ON FUNCTION
• biological waxes
Protective coating
hydrolysisoccurs & lipids are converted into 2 or more smaller molecules
• Triacylglycerols
• Phospholipids
• Sphingoglycolipids
• Biological waxes
Saponifiable
doesnotreact with water
• Cholesterol
• Steroid hormones
• Bile acids
• Eicosanoids
Nonsaponifiable
• Naturally occurring monocarboxylic acid • Usually contain
1. Evennumberofcarbons
2. unbranched carbon chain
3. Double bonds in a cis configuration (if present)
Fatty Acid
(t or f)
• Fatty acids may be classified based on the presence or absence of carbon-carbon double bonds
true
• all C-C bonds are single bonds
Saturated fatty acids
• one double bond
Monounsaturated Fatty Acids
• >1 double bond
Polyunsaturated Fatty Acids
• 2 numbers separated by a colon is used to denote length & number of C-C double bonds
• Carboxyl atom is C1
• Enclosed in parenthesis: Capital delta (Δ) with superscript indicating location of C-C double bonds
Delta Nomenclature
• C1 is the carbon atom on the methyl (noncarboxyl) end (ω)
• Family is determined by the location of the C-C double bond closest
to the omega end
Omega Nomenclature