Chapter 6_Protein_Class

Chapter 6_Protein_Class - Chapter 6 Proteins and Amino...

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Unformatted text preview: Chapter 6 Proteins and Amino Acids Proteins are made of ◦ Contain carbon, hydrogen, oxygen (like carbohydrates and fats) Also contain ◦ Each amino acid has: Acid group (-COOH) Amine group (-NH2) Side chain (unique) ◦ Twenty different amino acids found in proteins What are Proteins? Nine essential amino acids Eleven nonessential amino acids **Conditionally essential amino acids Essential and Nonessential Amino Acids Peptide bonds hold amino acids together. ◦ Acid group of one amino acid connected to the amine group of another amino acid 2 amino acids = 3 amino acids = Many amino acids = Proteins may contain 100 – 10,000 amino acids. Building Proteins from Amino Acids Denaturation: unfolding of protein shape by heat, acids, bases or salts ◦ Change of protein shape alters its function Examples: Protein Function Altered by Denaturation Dietary proteins are digested and absorbed in and ◦ Stomach acids denature protein and activate , which breaks down protein into shorter polypeptides ◦ In the small intestine, polypeptides broken down into tri-, dipeptides and amino acids ◦ Amino acids enter blood and travel to What Happens to the Protein You Eat? Amino acids come from: 1. 2. 3. Process of continuous breakdown and synthesis of protein from its amino acids: Your Body Degrades and Synthesizes Proteins Amino acids can be used to make: Body proteins Non-protein substances Examples: After amine groups removed, converted to urea, excreted in urine, amino acids can also be: 1. 2. 3. What is Next for Amino Acids After Protein is Digested?...
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This note was uploaded on 02/20/2012 for the course HPEB 502 taught by Professor Montgomery during the Fall '09 term at South Carolina.

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Chapter 6_Protein_Class - Chapter 6 Proteins and Amino...

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