Lecture3 - Lecture 3 1/9/09 Background reading Garrett and...

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Lecture 3 1/9/09 Outline Amino acids – general properties Common amino acids found in proteins Amino acids with nonpolar aliphatic R groups Amino acids with polar uncharged R groups Amino acids with aromatic R groups Amino acids with positively charged R groups Amino acids with negatively charged R groups Background reading Garrett and Grisham: Chapter 4: Pages 76 - 85 Assignment Memorize structures and one letter codes of the 20 amino acids.
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Amino acids – general properties Building blocks of proteins. Generic structure: COOH R H 3 N + C H Consists of a tetrahedral C covalently bonded to four different substituents, a COOH, a Hydrogen an amino group and a variable side chain, called the R group. Two properties are evident from the above structure: 1) Stereoisomerism due to the tetrahedral carbon atom This C is asymmetric and the groups can be arranged in space two different ways to get 2 different compounds that are mirror images of one another.
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Lecture3 - Lecture 3 1/9/09 Background reading Garrett and...

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