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Unformatted text preview: permeable). Cholesterol also stabilizes a membrane against subtle temperature changes; it acts as a buffer to broaden the transition temperature so a membrane can remain functional over a broader t emp range. Temperature: Biomembranes tend to become more viscous as temperature is lowered, and more fliud at higer temperatures. Lipid rafts: Lipid rafts , because they are composed of relatively large integral membrane proteins, sphingomyelin and cholesterol, tend to create micro-comains of low fluidity....
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- Spring '08
- cell biology