Question

Question 5

Bio206 Homework 6 Amino Acids and Proteins Organic Chemistry II Due May 6, 2017 1. Which amino acid is least likely to be found in a natural protein? CH20H NHz CHs IV 2. A pentapeptide has the molecular formula: Asp, Glu, His, Phe, Val. Partial hydrolysis of the pentapeptide gives: Val Asp, Glu His, Phe Val, and Asp Glu. What is the amino acid sequence of the pentapeptide? 3. When the pentapeptide below is heated first with 2,4-dinitrofluorobenzene (and base) and then subjected to acidic hydrolysis, which amino acid will bear the dinitrophenyl group? Leu V al Gly Phe Ile 4. Draw the scheme of the reaction of GlyCys with H202 5. Using the three-letter code names for amino acids, write the structures of all possible peptides containing these amino acids: Val, Ser, Leu 6. Draw the structure of the following tripeptide (starting with the N-terminal residue and ending with the C-terminal residue), showing stereochemical details: Gly-Phe- Met

Answer 1

Scr Leu レ 7) Ser - Va-Leu S Ser -Ley -Val a Ley -Ser -Val