Please correct answer and don't use hand rating 8. Which free amino acid(s) below can have its side chain be involved in hydrogen-bonding?a) Fb) Mc) Dd) None of the above has an aromatic ring in its side chainHHS-

1. Phenylalanine (F)Phenylalanine is a non-polar amino acid with a hydrophobic side chain. Its side…

Answered: 8. Which free amino acid(s) below can…

Chemistry: Matter and Change

1st Edition

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Chapter23: The Chemistry Of Life

Section: Chapter Questions

Problem 41A

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What special role does the amino acid cysteine have in the peptides vasopressin and oxytocin?
For the tripeptide GlyAlaCys a. What amino acid is located at the peptides N-terminal end? b. What amino acid is located at the peptides C-terminal end? c. How many peptide bonds are present? d. How many amide linkages are present?
A chemically modified guanidino group is present in cimetidine (Tagamet), a widely prescribed drug for the control of gastric acidity and peptic ulcers. Cimetidine reduces gastric acid secretion by inhibiting the interaction of histamine with gastric H2 receptors. In the development of this drug, a cyano group was added to the substituted guanidino group to alter its basicity. Do you expect this modified guanidino group to be more basic or less basic than the guanidino group of arginine? Explain.
Draw a segment of the backbone of a protein that is long enough for three peptide linkages to be present.
For the tripeptide SerArgIle which amino acid residues a. are hydrophilic b. are hydrophobic c. possess polar neutral R groups d. participate in two amide linkages
this is one question, it just has multiple parts.
B Identify the functional groups found in the side chair (the & group). Is the R-group. polar neutral polar changed, or non-polar & №t₂ CH₂ ANCH E-0- Aspamagine CH3 Ś CH₂ &#₂ O + HƠN CH Co Methionine HO HD Cf chts - c-E-0- threonne If these o acids represent L-amino acids, draw the general structure for a D-amino acid.
a-Amino acids have the following general form: H H,N-C R-group a) Draw the structures of any amino acid (one for each of the following) with: i. A hydrophobic R-group-that contains a double bond An acidic R-group A basic R-group ii. ii. The amine, carboxylic acid and R-group of an amino acid may be ionised under certain pH conditions. b) For amino acids (i– i), draw their most probable structure in biological fluid, pH 7.4. c) For amino acids (i– i), draw their most probable structure in stomach acid, pH 1. -
Draw the tetrapeptide below out in full chemical structure by attaching the four amino acidsin order (this is an application of the characteristicorganic reaction Formation of an Amide. You can use any chemical notation orcombination of notations to draw your structure, but all bonds and atoms must be shown. Tyr-Cys-Met-His
Please provide explanation using researches or journals. Thank you
23. The amino acid side chains of 17 of the 20 most common amino acids are shown below. Which are aromatic side chains? Type their corresponding letter in alphabetical order.
4: Draw structures from notations or notations from structures, for the following dipeptides. Look up in book for the structures of various amino acids and their names (and notations). (EOCQ 60) Hints for drawing a dipeptide from the specified amino acids. From the given symbols (Ser, Thr, etc), draw the structures for the amino acids in the specified order example, for Ser-Thr, draw Serine first and then Threonine). Then remove the OH from the first amin and one H (from the N atom) on the second amino acid. Then join the remaining fragments; that give the dipeptide formed. In these reactions, H2O is formed as a side product; but it is implied, and you have to show it in your answers. The following equation illustrates that. Here, R and R' are symbolic. In an actual question, you must the actual structures for the amino acids (Table 16.3 in the book). O H || | Н.N— CH— С-N-CH—С-ОН H,N-CH-C–OH + H,N-CH-Ċ–OH R' R. R' (H2O is a sid no need t Amino acid 2 dipeptide Amino acid 1 а. Cys-Ser…

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8. Which free amino acid(s) below can have its side chain be involved in hydrogen- bonding? a) F b) M c) D d) None of the above has an aromatic ring in its side chain H H S-