chapter 6 - CHAPTER 6 PROTEINS"Proteins are versatile and...

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CHAPTER 6 PROTEINS Proteins are versatile and vital cellular working molecules. Without them, life would not exist.” (p.186)
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HIGH PROTEIN FOODS Usually between 11%- 30% of protein MEAT, FISH, POULTRY, EGG, MILK, SOYBEANS GOOD SOURCES are LEGUMES, CEREAL, BREAD, PEANUT BUTTER
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FACTS ABOUT PROTEINS There are 20 amino acids 9 amino acids (AA)are essential Amino Acid + Amino Acid= Peptide Bond Heredity determines amino acid sequence Proteins can be distorted in shape by heat, alcohol, acids, bases, or salts of heavy metals…THIS IS THE FIRST STAGE OF DESTRUCTION (good only for digestion purposes) AA can be converted to glucose
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PROTEIN FACTS Differ from fats and carbohydrates in that they contain NITROGEN as well as carbon, hydrogen and oxygen atoms. Amino Acids are the building blocks of proteins Amino group contains a nitrogen attached to an atom Proteins are essential for growth and repair of all tissues.
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FUNCTIONS OF PROTEINS Build new tissue (growing kids, pregnancy, athletic training, injury repair) Upkeep of tissues already built and replacement of regular losses (skin, hair, nails, GI tract, blood cells) Regulates internal H2O and acid-base balance Precursor for enzymes, hormones, antibodies, and Niacin (comes from tryptophan) Milk formation during lactation May be burned for energy (energy needs have higher priority than maintenance of tissue proteins)
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THE ESSENTIAL AMINO ACIDS MATT V. PHILL p. 179 ( (arginine used to be essential is for infants,) There are 20 different amino acids. There are 9 ESSENTIAL AMINO ACIDS Without the 9 essential AA the body cannot make the proteins it needs to do its work Proteins can be broken apart and the AA reused AA can be used as energy and the nitrogen discarded as waste A PEPTIDE BOND is what holds AA together to form a protein All essential AA must be present all at the same time with enough kcals to make a complete protein
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chapter 6 - CHAPTER 6 PROTEINS"Proteins are versatile and...

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