Flashcards in Chapter 3.1 Deck (5)
Describe Membrane Proetins
2% of the molecules in plasma membrane
50% of its weight
Describe Transmembrane proteins
-Pass through membrane
-Have hydrophilic regions in contact with cytoplasm and extracellular fluid
-Have hydrophobic regions that pass back and forth through the lipid of the membrane
-Most are Glycoproteins
-can drift about freely in phospholipid film
-Some anchored to cytoskeleton
What are Peripheral Proteins?
-Adhere to one face of the membrane
-usually tethered to cytoskeleton
How to membrane receptors work?
The facilitate Cell communication via chemical signals
-Receptors - Surface proteins on plasma membrane of target cell.
-Bind these chemicals (hormones, neurotransmitters)
- Receptor usually specific for one substrate