The characteristics of movement of molecular across membrane 1. rate of transport is higher than can be 500 accounted for by diffusion through a lipid passive protein-med bilayer transport 2. it can be highly specific 3. it often shows saturation kinetics 4. transport can be competitively inhibited by compoun structurally similar to the transported molecule simple diffusion 01234567891011121314 nal concentration of gi
The characteristics of movement of molecular across membrane
A plot of enzyme(transport)activity versus substrate concentration 重 Substrate concentration [S
Movement of molecules across membranes 4 mechanisms 1. Diffusion directly through the lipid bilayer 2. Transport via carrier proteins facilitated Passive diffusion fransport 3. Transport through ion channels 4. Active transport ATPases Co-transport
Movement of molecules across membranes 4 mechanisms 1. Diffusion directly through the lipid bilayer 2. Transport via carrier proteins 3. Transport through ion channels 4. Active transport - ATPases - co-transport facilitated diffusion Passive transport