BIOL 2520 Lecture Notes - Lecture 16: Phosphatidylcholine, Heat Map, Ethanolamine
9 Dec 2017
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L e c t u r e 1 6 | 1. Membranes an overview: continuous, unbroken sheets, enclosing compartments, defines cell"s interior + exterior, dynamic structures capable of fusing without losing continuity. Plasma membrane: encloses contents of entire cells. Summary of membrane functions: compartmentalization, site for many biochemical activities scaffolding for many enzymes. Membranes need to hold integral proteins in place to create structure: provide a selectively permeable membrane. Permeable to lipids, steroids, o2and co2; less permeable to water and impermeable to water-soluble compounds. Pumps needed; gradients formed between inside and out: responding to external signals signal transduction; interaction of receptors with ligands. Plasma membrane in cell is covered with various receptors; once they receive molecule they bind to it. Cells that are adjacent to one another know how to interact appropriately; when cells become cancerous, they lose basic understanding of where to attach. L e c t u r e 1 6 | 2: energy transduction.
