ch01 - identical they can often be discriminated by the way...

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Introduction Chapter 1 Key Points: 1. Universality of biochemistry 2. Cells and compartments 3. Chemical reactivity
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“tree of life”
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Bacteria
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Gram negative cells have a periplasmic space
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1-7a
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1-36 Endosymbiont Hypothesis
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Electron micrograph of liver cell What does it take for a cell to be “alive”? Integrity of compartment Energy Respond to environment Reproduce itself
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Chemistry Most biomolecules only contain: H, C, N, O, P, & S
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Chemistry Most biomolecules only contain: H, C, N, O, P, & S
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Chemistry
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Molecular conformation is everything in biology! Configuration = fixed spatial arrangement of atoms in molecule conferred by double bonds, or by a chiral center . Configurational isomers cannot be interconverted without breaking a covalent bond
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1-19a Two mirror image stereoisomers are called enantiomers Although their chemical properties are similar, or even
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Unformatted text preview: identical, they can often be discriminated by the way they rotate polarized light. p. 17 Cahn-Ingold-Prelog convention : RS system priorities : -SH > -OCH 2- > -OH > -NH 2 > -COOH > -CHO > -CH 2 OH > -CH 3 > -H enantiomers 3 2 a. S b. R Structure Older D-L nomenclature from dextro or levo rotation of light. 1-23a 1-23b Energy ATP provides the energy for many reactions in the cell Prebiotic evolution Origin of life theories: chemical evolution from primordial soup simple organic molecules associate into larger complexes spontaneously form membranes and catalysts = precursors to first cells. Miller-Urey (1953) experiments demonstrated feasibility: 1-33 Amino acids, sugars, aldehydes, cyanide, nucleotides CO CO 2 1-34 CH 339K CH 339L Long Term Course Goals End of Chap 1...
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This note was uploaded on 05/01/2011 for the course CH 53890 taught by Professor Raymonds during the Spring '09 term at University of Texas.

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ch01 - identical they can often be discriminated by the way...

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