Membranes + lipids Flashcards
1
Q
which factors affect membrane fluidity?
A
- temperature
- length and degree of saturation
- amount of cholesterol
2
Q
what are the roles of membrane proteins?
A
transport, recognition, maintaining cell shape
3
Q
what is SERCA?
A
a multi-domain protein that uses ATP to drive Ca2+ transport in the ER
4
Q
describe the structure of ion channels in the membrane
A
K+ channel composed of 4 sub units. dehydrated K+ fits precisely into the pore, stabilised by interactions with the protein
5
Q
what are integrins?
A
cell membrane proteins which span the cell membrane, allowing adhesion of cells
6
Q
describe the structure of insulin receptor proteins
A
dimeric protein consisting of 2 identical sub units
