Ch. 6 SG - Nutrition - NutritionStudyGuide(Ch.6)...

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Nutrition Study Guide (Ch. 6) Chapter Six – Proteins Proteins are made up of amino acids; contain carbon, hydrogen, oxygen, and nitrogen Each amino acid has: Acid group –COOH Amine group –NH3 Side chain (unique) 20 Different amino acids found in proteins 9 essential and 11 non essential amino acids Under certain conditions, the body cannot make non essential amino acids Histidine: found in infants; important (its an essential amino acid) Peptide bonds hold amino acids together; acid group of one amino acid connected to the amine group of  another amino acid 2 amino acids = dipeptide and 3 amino acids = tripeptide and many amino acids = polypeptide Proteins contain 100-100,000 amino acids Form specific 3D shapes due to interactions between side chains of amino acids Protein shape enables performance of different tasks Alterations in sequence can be bad (aka sickle-cell disease, one off) Denaturing Proteins
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Nutrition Study Guide (Ch. 6) Digestion (stomach acid) Protein function altered by denaturation Changes shape of protein  changes function Making eggs!!! Dietary proteins are digested and absorbed in stomach and SI; stomach acids denature proteins Active pepsin, which breaks down protein into shorter polypeptides
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This note was uploaded on 02/13/2011 for the course NUR 00001 taught by Professor Abc during the Spring '11 term at Cornell University (Engineering School).

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Ch. 6 SG - Nutrition - NutritionStudyGuide(Ch.6)...

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