Unit 1 - Topic 2 - Proteins - Section B - The synthesis and transport of proteins - Part III - Movement of proteins between membranes Flashcards
Once proteins are in the ER how are they transported
They are transported by vesicles that bud off from the ER and fuse with the Golgi apparatus
What do proteins undergo as they move through the Golgi apparatus
Post-translational modification
How do molecules undergo post-translational modification
Molecules move through the Golgi discs in vesicles that bud off from one disc and fuse to the next one in the stack. Enzymes catalyse the addition of various sugars in multiple steps to form the carbohydrates.
What is the major modification of proteins
The addition of carbohydrate groups
What do vesicles that leave the Golgi apparatus do
They take proteins to the plasma membrane and lysosomes. The vesicles move along microtubules to other membranes and fuse with them within the cell
