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Chem103 S08 Lecture 2

Chem103 S08 Lecture 2 - Chem 103 Spring 2008 Chemistry of...

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Chem 103 Spring 2008 Chem 103 Spring 2008 Chemistry of Life Processes Chemistry of Life Processes * BIOPOLYMER CHEMISTRY * STRONG vs WEAK ACIDS * NON-LINEAR RELATIONSHIP BETWEEN CONCENTRATIONS OF SPECIES IN THE WEAK ACID SOLUTIONS LECTURE #2 PROFESSOR O’HALLORAN
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Lipids define chemically unique spaces in living systems: Cells and compartments within cells
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Lipids and Membranes
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Escherichia coli This illustration shows a cross-section of a small portion of an Escherichia coli cell. The cell wall, with two concentric membranes studded with transmembrane proteins, is shown in green. A large flagellar motor crosses the entire wall, turning the flagellum that extends upwards from the surface. The cytoplasmic area is colored blue and purple. The large purple molecules are ribosomes and the small, L-shaped maroon molecules are tRNA, and the white strands are mRNA. Enzymes are shown in blue. The nucleoid region is shown in yellow and orange, with the long DNA circle shown in yellow, wrapped around HU protein (bacterial nucleosomes). In the center of the nucleoid region shown here, you might find a replication fork, with DNA polymerase (in red-orange) replicating new DNA. © David S. Goodsell 1999.
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