Lect_4_notes - Bio 1A Lecture 4 January 30, 2008 Professor...

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Bio 1A Lecture 4 January 30, 2008 Professor Schlissel Amino Acids, Proteins and Protein Structure 1. Proteins are polymers of amino acid building blocks. Sizes range from ~10 to greater than ~30,000 amino acids in length. By first the most diverse and important family of macromolecules in living organisms. Proteins are responsible for most all of cellular function including catalysis, structure, motility, storage, signaling, transport, defense, etc. 2. Structure of an amino acid. 20 different “R” groups (side-chains) define 20 different amino acids. Structural diversity comes from the number of ways one can put together polymers of these amino acids. 100 amino acid protein—20 100 possibilities!!! 3. Amino acids can be groups based on chemical similarity of their R groups. Nonpolar, aliphatic; polar, uncharged; positively charged; negatively charged; aromatic. Know which group each of the 20 amino acids falls into. Cysteine is unique in its ability to form disulfide bonds.
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This note was uploaded on 04/01/2008 for the course BIO 1A taught by Professor Schlissel during the Spring '08 term at University of California, Berkeley.

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Lect_4_notes - Bio 1A Lecture 4 January 30, 2008 Professor...

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