MCD BIO 165A Lecture 2: Lecture 2
29 Nov 2016
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Document Summary
Amphipathic - polar/hydrophilic head, 2 hydrophobic tail chains. Rigidity but also provides flexibility when needed. Under hot conditions - double bond decreases, more cholesterol -> stronger structure. E coli has no cholesterol mito membrane has a lot of protein, few lipids (needs lots of protein for motility, function) Majority of ps is on the inside (cytosolic) Proteins remove lipids like a forceps - grab and remove. Large majority of the proteins made in a cell. Function as receptors in signal transduction, as channels, Peripheral proteins - either inner or outler or bound to another. Peripheral proteins - either inner or outler or bound to another protein. Provide cushion and allows for movement around the lipids. Ras protein is made in cytosol, enzyme modifies ras to have gpi anchor, allows ras to associate with membrane as an achor. Covalently bond, enzyme needed to clip it off. Use detergent to chop up and use sds page to study the different proteins.
