BIOL 2021 Lecture Notes - Lecture 8: Cell Membrane, Peptide, Exocytosis
Document Summary
Previously we learned that there are three ways proteins can move between compartments: gated transport, trans membrane transport. [endocytosis] also to capture important nutrients (macromolecule bonded vitamins, cholesterol, and iron) into endosomes and lysosomes; transported into the cytosol various biosynthetic processes. Interior space, or lumen, of each membrane-enclosed compartment, is equivalent to the lumen of most other membrane- enclosed compartments & cell exterior proteins can travel in this space without having to cross a membrane. These containers are: formed from donor compartments, small or large, spherical or irregular, vesicles or tubules, the term transport vesicle to apply to all forms of these containers. There are three vesicular transport pathway: biosynthetic secretory pathway. New proteins, carbohydrates and lipids are delivered to the plasma membrane or extracellular space. Leads outward from the er to the golgi and cell surface, with a side route leading to lysosomes: endocytosis.
