Biology 1202B Lecture Notes - Lecture 10: Transmembrane Protein, Alpha Helix, Sterol
24 Aug 2016
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5. 1 an overview of the structure of membranes. By acting as a selectively permeable barrier, the plasma membrane allows for the uptake of key nutrients and elimination of waste products while maintaining a protected environment for cellular processes to occur. 5. 1a a membrane consists of proteins in a fluid of lipid molecules. Current view of membrane structure is based on the fluid mosaic model. Biological membranes have a double layer known as bilayer. Relative proportions of lipid and protein within a membrane depending on the type of membrane. 5. 1b experimental evidence in support of the fluid mosaic model. Fluid mosaic model of membrane structure is supported by 2 major pieces of experimental evidence: membranes are fluid, membrane asymmetry. David frye and michael edidin grew human cells and mouse cells separately. They tagged each membrane protein with dye molecules. Swaathy selvagnanam: human proteins were linked to red dye molecules, mouse proteins were linked to green dye molecules.
