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Ans Rev28 - Summary/Review of Chapter 28 1 Draw the...

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Summary/Review of Chapter 28 1. Draw the structure of Gly-Ala-Phe-Ala, and indicate the preferred conformation of the amide bonds. Which one is the C-terminal, and which is the N-terminal amino acid? 2. What is the definition of isoelectric point? If glycine has an isoelectric point of 5.97, does it have a net negative or net positive charge at pH=7.0 ? 'electric neutral' i.e. same amounts of cation and anion. More negative carboxylate anion at pH 7.0. 3. Nearly all natural amino acids are called L-amino acids. Draw a Fischer projection of phenylalanine, showing the absolute configuration. Is it "R" or "S"? 4. Predict the products of the following reactions:
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