Concept explainers
(a)
Interpretation:
The structure of Gly-Phe should be drawn.
Concept Introduction:
An
(b)
Interpretation:
The structure of Gln-lle should be drawn.
Concept Introduction:
An amine or peptide bond is a chemical bond. It is formed when amino groups of one molecule is reacts with carboxylic group of other molecule. Derivation of two amino acid is known as dipeptide.
(c)
Interpretation:
The structure of Leu-Cys should be drawn.
Concept Introduction:
An amine or peptide bond is a chemical bond. It is formed when amino groups of one molecule is reacts with carboxylic group of other molecule. Derivation of two amino acid is known as dipeptide.
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General, Organic, & Biological Chemistry
- 22-48 How many amino acid residues in the A chain of insulin are the same in insulin from humans, cattle (bovine), hogs, and sheep?arrow_forward22-42 (a) How many atoms of the peptide bond lie in the same plane? (b) Which atoms are they?arrow_forward22-84 How many different dipeptides can be made (a) using only alanine, tryptophan, glutamic acid, and arginine and (b) using all 20 amino acids?arrow_forward
- 22-46 How many different tripeptides can be made (a) using one, two, or three residues each of leucine, threonine, and valine and (b) using all 20 amino acids?arrow_forward22-47 How many different tetrapeptides can be made (a) if the peptides contain the residues of asparagine, proline, serine, and metbionine and (b) if all 20 amino acids can be used?arrow_forwardThere are six isomeric tripeptides that contain valine, tyrosine, and glycine. Name them using both three- and one-letter abbreviations.arrow_forward
- 22-6 The members of which class of proteins are insoluble in water and can serve as structural materials?arrow_forwardHuman and horse insulin both have two polypeptide chains, with one chain containing 21 amino acids and the other containing 30 amino acids. They differ in primary structure at two places. At position 9 in one chain, human insulin has Ser and horse insulin has Gly; at position 30 in the other chain, human insulin has Thr and horse insulin has Ala. How must the DNA for the two insulins differ?arrow_forwardFor 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?arrow_forward
- . How many possible primary structures exist for a small polypeptide containing four individual amino acids?arrow_forwardWhich statement best explains the chemical differencesbetween DNA and RNA? (a) DNA has two different sugarsin its sugar–phosphate backbone, but RNA only has one.(b) Thymine is one of the DNA bases, whereas RNA’s correspondingbase is thymine minus a methyl group. (c) TheRNA sugar–phosphate backbone contains fewer oxygenatoms than DNA’s backbone. (d) DNA forms double helicesbut RNA cannot.arrow_forwardDraw the structure and give the name of the dipeptide and tripeptide VENY (N-Terminal= V and C-terminal= Y)arrow_forward
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