Ch27 Reactions Of Amino Acids The most important reactions are fair as amino acid chemistry is concerned are the reactions that are utilised in the formation of peptides and proteins. the reaction with ninhydrin is used as a visual indicator as a there is a colour change (primary amines give a blue purple product) amines : acylation to form amides. carboxylic acids. Nucleic acids. 27.1 classification of amino acids. 27.2 stereochemistry of amino acids. 27.3 acid base behavior of amino acids. 27.4 synthesis of amino acids. 27.5 reactions of amino acids. 27.6 some biochemical reactions involving amino acids. 27.7 peptides. 27.8 peptide structure determination: amino acid analysis.
Ch27 Reactions Of Amino Acids Summary. amino acids contain at least an amine and carboxylic acid functional group. amino acids can be joined via amide bonds to give peptides. proteins are polypeptides of 50 or more amino acids. proteins are a fundamental biological component for skin, hair, muscles, connective tissues, many enzymes etc. Exercise 4.2.1 4.2. 1. draw the structure for the cation formed when valine (at neutral ph) reacts with an acid. draw the structure for the anion formed when valine (at neutral ph) reacts with a base. the particular ph at which a given amino acid exists in solution as a zwitterion is called the isoelectric point (pi). α α amino acids react with aldehydes to form decarboxylation and or deamination products. the reaction sequence is shown in figure 25 5 and closely resembles the ninhydrin reaction (section 25 4a). in the first step the amine condenses with the aldehyde to give an imine or schiff base, 2 2. what happens next depends on the relative rates of. Exercise 18.2.1 18.2. 1. draw the structure for the cation formed when valine (at neutral ph) reacts with an acid. draw the structure for the anion formed when valine (at neutral ph) reacts with a base. the particular ph at which a given amino acid exists in solution as a zwitterion is called the isoelectric point (pi).
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