BIOL 112 Lecture 7: BIOL 112 Lecture 7 : BIOL 112 Lecture : BIOL 112 Lecture : Jan 28 2019: Lecture 6: Membrane7

• School: McGill University
• Department: Biology
• Course: BIOL 112
• Professor: Joseph Dent, Frieder Schock

Document Summary

Hydrophobic proteins can insert into lipid bilayer. Does not interact with the lipid bilayer. Hydrophilic amino acids will be and either ends of the membrane. Cannot move vertically up and down the membrane but can move. Fluid because phospholipids free to move around fluid . Do not cross lipid bilayer and are attached to the outside of or to transmembrane. Using a sharp knife to insert the cell, the lipid bilayer with separate into 2 leaflets. Separates membrane through middle because there a fewer bond in there. Only van der waals interactions there instead of h bonds. Passive mixing of substances resulting in transport along a concentration gradient. Random walk (brownian motion) of individual molecules due to thermal motions and collisions. Diffusion rates are determined by distance, temperature, size of molecule, and steepness of concentration gradient. Diffusion of water across a selectively permeable membrane.