Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Chapter 2, Problem 33P
Interpretation Introduction
Interpretation:
The given amino acid sequence needs to be translated in the one-letter-code.
Concept introduction:
Amino acids are compounds containing amino as well as acidic group. The general molecular structure of an amino acid is as follows:
Here, R is different group for different amino acids. If there is more than one amino group present in an amino acid, they are considered as basic amino acids and if there is more than one carboxylic group then they are considered as acidic amino acids.
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N.
HN
H3N
Where on this amino acid does it attach to a
primary sequence of a protein and where is the
ionizable position of the R group?
PRACTICE NAMING. Identify the number of amino acids, number of peptide bonds, and name
the peptide.
i.e. Ala-Cys
• Dipeptide
• 1 peptide bond
• Alanylcysteine
Cys-tyr-phe-gln-asn-cys-pro-arg-gly
Pro-Ser-Ala-Phe-Glu. Draw this peptide at pH 7 and include its stereochemistry.
Chapter 2 Solutions
Biochemistry
Ch. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - Prob. 10P
Ch. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 16PCh. 2 - Prob. 17PCh. 2 - Prob. 18PCh. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - Prob. 21PCh. 2 - Prob. 22PCh. 2 - Prob. 23PCh. 2 - Prob. 24PCh. 2 - Prob. 25PCh. 2 - Prob. 26PCh. 2 - Prob. 27PCh. 2 - Prob. 28PCh. 2 - Prob. 29PCh. 2 - Prob. 30PCh. 2 - Prob. 31PCh. 2 - Prob. 32PCh. 2 - Prob. 33PCh. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - Prob. 36PCh. 2 - Prob. 37P
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- Thr-Lys-Pro-Ile-Val-Ala-Pro-Met-Glu-Tyr-Gly-Lys Write the sequence using one-letter abbreviations. sequence: TLPIVAPMGYGK Incorrect Estimate the net charge on the peptide at pH 7. charge at pH 7: +1 Estimate the net charge on the peptide at pH 12. charge at pH 12: 0 Incorrectarrow_forwardAmino sequence: Gln-Glu-Val-Leu-Ile-Arg-Leu-Phe-Lys-Gly-His-Pro-Glu-Thr-Leu-Glu-Lys-Phe-Asp-Lys-Phe-Lys-His-Leu-Lys-Ser-Glu-Asp-Glu-Met-Lys-Ala-Ser-Glu-Asp-Leu-Lys A) List the fragments generated with trypsin: B) List the fragments generated with chymotrypsin (5 pts) (assume reaction conditions are used to maximize cutting to the C-terminal size of only the 3 aromatic amino acids.)arrow_forwardo-H H. Hy-H H. From the N-terminus, this sequence is found on the 125th residue onwards. Based on this information, is the protein where this fragment is found in a globular protein, or fibrous protein? Justify your answerarrow_forward
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- a. Use three-letter amino acid abbreviations to write the representation for the tripeptide shown here. i H₂N-CH-C-N-CH-C-N-CH-C-0- CH₂ H -NH H ī CH₂ SH -CH-C-0- CH-OH CH3 b. Give the full name of the amino acid at the C-terminal end of this tripeptide. H₂N-CH-C-N-CH-C-N-CH-C-O- -CH-C-N-CH-C CH₂ c-o- CH₂ OHarrow_forwardBe sure to answer all parts. Give the amino acid sequence of an octapeptide that contains the amino acids Thr, Phe, Ile (2 equiv), Asp, Cys, Val, Leu, and forms the following fragments when partially hydrolyzed with HCl: Thr-Ile-Phe, Phe-Ile-Asp-Val, and Asp-Val-Cys-Leu.arrow_forwardAmino Acid: Asn-Met-Ser-Ile-Phe-Arg-Cys-Tyr-Lys What is the one letter code of this amino acid and what is its classification? What is the side chain description (e.g. amide, aromatic etc.)arrow_forward
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