Biochemistry-Membrane Structure and Function

Biochemistry

Membrane Structure And Function




Compiled By Simon Mwangi
Edition: 2024/25

, Science | Biochemistry I of V pages
1. outer leaflet
exposed to the external side

2. inner leaflet
exposed to the cytoplasmic side

3. leaflets can vary between
different parts of the membrane
phospholipid content, protein content, etc

4. the phospholipid bilayer undergoes
natural oscillation

5. glycerol backbone contains
3 OH groups

6. the 3 OH groups of glycerol are sites for
side chain attachment

7. the glycerol backbone is attached to
fatty acid tails
polar phosphate head

8. sphingosine backbone is usually O-linked to a
charged group and amide-linked to an acyl group, such as a fatty acid

9. when you have a FA attached to the glycerol=
nonpolar

10. when you have a phosphate attached to the glycerol=
polar

11. diffusion in saturated lipids
slow because it is tightly packed

12. diffusion in mixed saturated and unsaturated lipids
quick because there is spacing created because of the kinks and is therefore much more open and molecules

13. membrane phospholipid bilayers serve as
semipermeable membranes

14. charged molecules cannot diffuse through
the lipid bilayer

15. O2, N2, H2O, and CO2 can
diffuse rapidly across the lipid bilayer



Biochemistry 2024/25 Edition