NUTR 3210 Final: Study Notes

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20 encoded by dna, except selenocysteine and pyroolysine which are used rarely. Usually formed by post-translational modification of other amino acids or as intermediates in the metabolic pathways of standard amino acids. Rarely used to make proteins: d vs l amino acids: No overall charge (not withstanding r group charge) Traditional presentation would occur in a strong acid. At physciological ph has negatively polar structure: amino acids connected by peptide bonds: Amino acids join through condensation reactions, in which water is lost by a reaction between carboxyl group of one amino acid and the amino group of another amino acid: protein synthesis: from aa to protein. 2 amino acids=dipeptides, 3 amino acids=tripeptide, 4-50 amino acids=oligopeptode, >50 amino acids=polypeptide, 1 or more polypeptide (biologically active protein: protein structure: Egg"sample: egg protein is called albumin, the albumin is native form when it is transparent and liquid. Cooking the egg denatures the albumin and becomes opaque and hard.

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