Biology 1002B Lecture Notes - Lecture 5: Integral Membrane Protein, Lipid Bilayer, Transmembrane Protein

• School: Western University
• Department: Biology
• Course: Biology 1002B
• Professor: Tom Haffie Denis Maxwell

Document Summary

Lecture 5 class: meaning of hydrophilic, hydrophobic, fatty acid, saturated, membrane fluidity, desaturase, membrane permeability, transmembrane protein (integral membrane protein), peripheral protein, simple diffusion, facilitated diffusion. A saturated fat is a fat in which the fatty acids all have single bonds. Fatty acids are the building blocks of the fat in our bodies and in the food we eat. Desaturases are a class of enzymes that introduce double bonds into fatty acids, thereby altering the degree of unsaturation. Membrane fluidity refers to the viscosity of the lipid bilayer of a cell membrane or a synthetic lipid membrane. Membrane permeability is essentially the ability of certain substances to pass in and out of an organic or semi-organic barrier. It is most commonly talked about in terms of biology, where the membrane is a cell wall and the substances passing in and out are elements of chemical production, cell food, and waste products.