Chapter 5(2) - The Structure and Function of Large...

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The Structure and Function of Large Biological Molecules Chapter 5B
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Proteins/Polypeptides Proteins are composed of carbon, hydrogen, oxygen and nitrogen, some contain sulfur Amino acids are the building blocks of proteins. There are 20 different amino acids. Amino acids are joined together by peptide bonds. Amino acids have an amine end (NH 2 ) and a carboxylic acid end (COOH) The portion between the NH 2 and COOH varies
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Proteins/Polypeptides A polypeptide consists of a number of amino acids joined by peptide bonds. A protein consists of one or more polypeptides folded or coiled into a specific 3-D structure . Proteins make up 50% or more of a cell’s dry weight Globular proteins are spherical in shape. Fibrous proteins are long and relatively straight.
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Functions of Proteins Enzymatic - Regulation – enzymes Structural – cell membranes, cell walls Storage – albumin/egg, casein/milk Transport – hemoglobin, Membrane transport
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This note was uploaded on 03/20/2012 for the course BIOLOGY 1305 taught by Professor Adair during the Spring '09 term at Baylor.

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Chapter 5(2) - The Structure and Function of Large...

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