StudentLecture_20 - LECTURE 20 11/5/2010 Reading for this...

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LECTURE 20 11/5/2010 Reading for this week: Biochemistry Interchapter, pp 497-512 ; page 473, 476 Lab next week: Organic reactions, Chapter 10 (To get familiar with polymer terminology, browse Section 10.5, pps 478-487) in your text. HW as usual
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Peptide Bonds Amino acids link together through a “peptide bond” Two amino acids dipeptide Many amino acids polypeptide amid group or Peptide bond
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Proteins Can range in size from about 50 to several thousand amino acids. Can have one or several separate polypeptide chains held together. Amino acid sequence determines shape and shaped determine function .
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Structure of Proteins: 4 Types Primary : sequence of amine acid N-terminus C-terminus
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Structure of Proteins Secondary : special arrangement of the polypeptide chain into shapes such as sheets or helices
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Structure of Proteins Tertiary : overall 3-D of a polypeptide chain helix and sheets Quaternary : arrangement of 2 units in the protein
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Potassium ion channel protein http://molvis.sdsc.edu/fgij/fg.htm?mol=1bl8
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8 Quaternary Structure Hemoglobin – 4 stranded protein http://molvis.sdsc.edu/fgij/fg.htm?mol=2hhd
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intermolecular help to determine secondary, tertiary and quaternary structures (with occasional help from S-S covalent bonds). Placement of polar
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This note was uploaded on 01/30/2011 for the course CHEM 116 taught by Professor Stevenson during the Spring '08 term at Purdue University-West Lafayette.

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StudentLecture_20 - LECTURE 20 11/5/2010 Reading for this...

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