Concept explainers
Interpretation:
The reason as to why two
Concept introduction:
The structure of proteins has four stages. These four stages are: primary, secondary, tertiary and quaternary structures. In primary structure, the amino acids are arranged to give the backbone of protein. In secondary structure, the pattern of the peptide chain is arranged in certain order. In tertiary structure, the interactions between the side chains of amino acids are considered. In quaternary structure, two or more peptide chains are linked.
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Chemistry For Today: General, Organic, And Biochemistry, Loose-leaf Version
- 22-91 Which amino acid does not rotate the plane of polarized light?arrow_forward22-21 Explain why an amino acid cannot exist in an un-ionized form at any pH.arrow_forwardClassify each amino acid by the chemical properties of its side chain (R group) at pH 7 . Select the amino acid that fits best in each category. Each amino acid will be selected only once.arrow_forward
- Classify each amino acid by the chemical properties of its side chain (R group) at pH 7. Select the amino acid that fits best in each category. Each amino acid will be selected only once. Which amino acid has a positively charged R group? lysine glutamine glutamate phenylalanine leucinearrow_forwardClassify each amino acid by the chemical properties of its side chain (R group) at pH 7 . Select the amino acid that fits best in each category. Each amino acid will be selected only once.arrow_forwardWhat type of amino acid has a side chain that contains –COO–? polar neutral nonpolar acidic basic conjugate basicarrow_forward
- Draw the structure for an epsilon-amino carboxylic acidarrow_forwardPlease explain alsoarrow_forwardClassify each amino acid by the chemical properties of its side chain (R group) at pH 7 . Select the amino acid that fits best in each category. Each amino acid will be selected only once.arrow_forward
- Lanthionine is a nonstandard amino acid consisting of two alanine residues linked via their β carbon atoms by a thioether (—S—) linkage. Draw the structure of lanthionine.arrow_forwardExplain which amino acids are acidic, which are basic, and which are neutral. Use theisoelectric point to predict whether a given amino acid will be positively charged,negatively charged, or neutral at a given pH.arrow_forwardDon't copy Write the chemical reaction of amino acid when it can acts as amphoteric molecule.arrow_forward
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