Lecture8

Lecture8 - Nitrogen retained Nitrogen absorbed BV = X 100...

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Fig. 7.3
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Fig. 4.10
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Synthesis of Tyrosine Phenylalanine Tyrosine (Essential AA) phenylalanine hydroxyase (Nonessential AA)
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Phenylketonuria Phenylalanine Tyrosine (Essential AA) phenylalanine hydroxylase (Nonessential AA) PKU: Reduced or Missing Control Intake Becomes essential
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Functions of Proteins Building blocks of body components Maintain fluid balance Contribute to acid/base balance Building block for hormones and enzymes Immune function Gluconeogenesis Energy yielding
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Is a High-Protein Diet Harmful? Low in plant foods (fiber), vitamins, phytochemicals Intake of animal protein increases risk for heart disease (high in saturated fat) Excessive intake of red meat is linked with colon cancer Burden on the kidney Increase calcium loss
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Biological Value Measure protein (AA) retention
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Unformatted text preview: Nitrogen retained Nitrogen absorbed BV = X 100 Protein Efficiency Ratio Used by FDA to set standards for baby food Compares the weight gained in a growing rat after 10 days or more eating a standard amount of protein Gram weight gain Gram protein consumed PER = Chemical Score of Protein Amount of each essential AA in a gram of protein in the food divided by an ideal amount for that essential AA (EAA) The lowest AA is used for scoring that food mg of EAA per gm of protein Required mg of EAA per gm of protein Chem. Score = Protein Digestibility Corrected AA Score (PDCAAS) Most widely used (on food labels) Maximum value is 1.0 (= milk, eggs, soy protein) PDCAAS = Chem. Score x (~0.9-1.0) Range of digestibility...
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This note was uploaded on 04/29/2008 for the course BICD 120 taught by Professor Crawford during the Spring '06 term at UCSD.

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Lecture8 - Nitrogen retained Nitrogen absorbed BV = X 100...

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