1. 17.5 Glycerophospholipids
Chapter 17 Lipids
17.5 Glycerophospholipids

2. Glycerophospholipids
Glycerophospholipids are
the most abundant lipids in cell membranes
composed of glycerol, two fatty acids, phosphate, and an amino alcohol

3. Glycerophospholipids Are Polar
A glycerophospholipid has
two nonpolar fatty acid chains
a phosphate group
one of three polar amino alcohols

4. Structure and Polarity of a Glycerophospholipid

5. Lecithin and Cephalin
Lecithin and cephalin are glycerophospholipids that
are abundant in brain and nerve tissues
are found in egg yolk, wheat germ, and yeast
contain choline (in lecithins) or either ethanolamine or serine (in cephalins)

6. Learning Check Identify each as a 1) fatty acid 2) triacylglycerol
3) amino alcohol 4) glycerophospholipid
A. Glyceryl trioleate
B. Cephalin
C. Choline
D. Palmitic acid

7. Solution Identify each as a 1) fatty acid 2) triacylglycerol
3) amino alcohol 4) glycerophospholipid
A. Glyceryl trioleate ) triacylglycerol
B. Cephalin 4) glycerophospholipid
C. Choline 3) amino alcohol
D. Palmitic acid 1) fatty acid

8. Learning Check
Identify the components and type of glycerophospholipid: O ║
CH2—O—C— (CH2)16—CH3 +
O NH3
║ │
CH2—O—P—O—CH2—CH−COO – │ O–

9. Solution Identify the components and type of glycerophospholipid: O ║
CH2—O—C— (CH2)16—CH3
O Stearic acids +
O NH3
║ │ Type = cephalin
CH2—O—P—O—CH2—CH−COO –
│ Serine
O– Phosphate Amino alcohol