MEDI110 Lecture Notes - Lecture 11: Essential Amino Acid, High-Protein Diet, Protein Quality
6 Aug 2018
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Document Summary
If cysteine and tyrosine are not consumed in the diet, methionine and phenyalanine will be used to make them. Phenylketonuria (pku) condition: enzyme is not present to break down phenylalanine, tyrosine must be consumed. Low phenylalanine diet is needed (otherwise it builds up in system) Functions of proteins in our diet: provide the 9 essential amino acids, provide the nonessential amino acids or nitrogen to make the non essential amino acids. Quality of protein: high quality protein or complete protein, contains ample amounts of all 9 essential aa e. g. animal proteins. Combining plant proteins: previously thought to be required at every meal (e. g. vegetarian/vegan, now recognised that, plant proteins can meet requirements when variety of plant foods are eaten and energy needs are met. In healthy individuals, a variety of plant foods eaten over day meets needs. Protein digestion: stomach, hcl, pepsinogen pepsin, proenzyme, small intestine, peptidases, proteases.
