Fundamentals of General, Organic, and Biological Chemistry, Books a la Carte Edition (8th Edition)
8th Edition
ISBN: 9780134218328
Author: John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. Peterson
Publisher: PEARSON
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Chapter 18.10, Problem 18.32P
Another endoprotease is trypsin. Trypsin hydrolyzes peptide bonds on the carboxyl side of lysine and arginine. If the following peptide sequence is hydrolyzed by trypsin, how many fragments will there be? Use the three-letter amino acid abbreviations to write the fragments out.
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A polypeptide is digested with trypsin, and the resulting segments are sequenced:
Val-Gly Ala-Ala-Gly-Leu-Trp-Arg
Arg-Asp-Pro-Gly-Lue-Met-Val-Leu-Tyr-Ala-Ala-Asp-Glu-Lys
And the following fragments are produced by chymotrypsin fragmentation:
Ala-Ala-Gly-Leu-Trp Arg-Arg-Asp-Pro-Gly-Leu- Met-Val-Leu-Tyr
Ala-Ala-Asp-Glu-Lys-Val-Gly
What is the sequence of the whole original polypeptide?
A polypeptide is digested with trypsin, and the resulting segments are sequenced:
Val-Gly
Ala-Ala-Gly-Leu-Trp-Arg
Arg-Asp-Pro-Gly-Lue-Met-Val-Leu-Tyr-Ala-Ala-Asp-Glu-Lys
And the following fragments are produced by chymotrypsin fragmentation:
Ala-Ala-Gly-Leu-Trp
Arg-Arg-Asp-Pro-Gly-Leu- Met-Val-Leu-Tyr
Ala-Ala-Asp-Glu-Lys-Val-Gly
What is the sequence of the whole original polypeptide? (Recall that trypsin cleaves a polypeptide backbone at the C-terminal side of Arg or Lys residues, whereas chymotrypsin cleaves after aromatic amino acid residues).
Consider the following protein sequence as an α helix: Leu-Lys-Arg-Ile-Val-Asp-Ile-Leu-Ser-Arg-Leu-Phe-Lys-Val. how many turns does this helix make?
Chapter 18 Solutions
Fundamentals of General, Organic, and Biological Chemistry, Books a la Carte Edition (8th Edition)
Ch. 18.2 - Prob. 18.1PCh. 18.2 - Prob. 18.2PCh. 18.3 - Prob. 18.3PCh. 18.3 - Examine the ball-and-stick model of valine in the...Ch. 18.3 - Indicate whether each of the following molecules...Ch. 18.3 - Prob. 18.6PCh. 18.3 - Prob. 18.7KCPCh. 18.3 - Prob. 18.8PCh. 18.3 - Prob. 18.9PCh. 18.3 - Prob. 18.10P
Ch. 18.3 - Prob. 18.11PCh. 18.3 - Prob. 18.12PCh. 18.4 - The proteins collagen, bovine insulin, and human...Ch. 18.4 - Prob. 18.2CIAPCh. 18.4 - Prob. 18.13PCh. 18.4 - Prob. 18.14PCh. 18.5 - Valine is an amino acid with a nonpolar side...Ch. 18.5 - Tripeptides are composed of three amino acids...Ch. 18.5 - Prob. 18.17PCh. 18.5 - Identify the amino acids in the following...Ch. 18.5 - Prob. 18.19PCh. 18.5 - Prob. 18.3CIAPCh. 18.5 - Prob. 18.4CIAPCh. 18.5 - Two of the most complete (balanced) proteins...Ch. 18.6 - Prob. 18.6CIAPCh. 18.6 - Prob. 18.7CIAPCh. 18.6 - (a)What atoms are present in a planar unit in a...Ch. 18.6 - Prob. 18.21PCh. 18.6 - Prob. 18.22PCh. 18.7 - Prob. 18.23PCh. 18.7 - Prob. 18.24PCh. 18.7 - Complete the following two sentences with either...Ch. 18.7 - Prob. 18.26KCPCh. 18.8 - Which of the following pairs of amino acids can...Ch. 18.8 - Look at Table 18.3 and identify the type of...Ch. 18.8 - In Figure 18.3, identify the amino acids that have...Ch. 18.8 - Prob. 18.30PCh. 18.9 - Prob. 18.31PCh. 18.10 - Another endoprotease is trypsin. Trypsin...Ch. 18.10 - Prob. 18.33PCh. 18.10 - Prob. 18.8CIAPCh. 18.10 - Prob. 18.9CIAPCh. 18 - Draw the structure of the following amino acids,...Ch. 18 - Prob. 18.35UKCCh. 18 - Prob. 18.36UKCCh. 18 - Prob. 18.37UKCCh. 18 - Prob. 18.38UKCCh. 18 - Threonine has two chiral centers. Draw L-threonine...Ch. 18 - Name four biological functions of proteins in the...Ch. 18 - Prob. 18.41APCh. 18 - Prob. 18.42APCh. 18 - Prob. 18.43APCh. 18 - Prob. 18.44APCh. 18 - Prob. 18.45APCh. 18 - Prob. 18.46APCh. 18 - Prob. 18.47APCh. 18 - Draw leucine and identify any chiral carbon atoms...Ch. 18 - Prob. 18.49APCh. 18 - Prob. 18.50APCh. 18 - Is histidine hydrophilic or hydrophobic? Explain...Ch. 18 - Prob. 18.52APCh. 18 - At neutral pH, which of the following amino acids...Ch. 18 - Prob. 18.54APCh. 18 - Prob. 18.55APCh. 18 - Prob. 18.56APCh. 18 - Prob. 18.57APCh. 18 - Proteins are usually least soluble in water at...Ch. 18 - Prob. 18.59APCh. 18 - Prob. 18.60APCh. 18 - Prob. 18.61APCh. 18 - Prob. 18.62APCh. 18 - Prob. 18.63APCh. 18 - (a)Identify the amino acids present in the peptide...Ch. 18 - Prob. 18.65APCh. 18 - Prob. 18.66APCh. 18 - Prob. 18.67APCh. 18 - Prob. 18.68APCh. 18 - Prob. 18.69APCh. 18 - Prob. 18.70APCh. 18 - Prob. 18.71APCh. 18 - Prob. 18.72APCh. 18 - Prob. 18.73APCh. 18 - Prob. 18.74APCh. 18 - Prob. 18.75APCh. 18 - What kind of bond would you expect between chains...Ch. 18 - Is the bond formed between each pair in Problem...Ch. 18 - Prob. 18.78APCh. 18 - Prob. 18.79APCh. 18 - Prob. 18.80APCh. 18 - Prob. 18.81APCh. 18 - Prob. 18.82APCh. 18 - Prob. 18.83APCh. 18 - Prob. 18.84APCh. 18 - Prob. 18.85APCh. 18 - Prob. 18.86APCh. 18 - Prob. 18.87APCh. 18 - Prob. 18.88APCh. 18 - Give an example of a protein that has quaternary...Ch. 18 - Prob. 18.90APCh. 18 - Prob. 18.91APCh. 18 - Prob. 18.92APCh. 18 - Prob. 18.93APCh. 18 - Prob. 18.94APCh. 18 - Prob. 18.95APCh. 18 - Prob. 18.96APCh. 18 - Prob. 18.97APCh. 18 - Prob. 18.98CPCh. 18 - Prob. 18.99CPCh. 18 - Prob. 18.100CPCh. 18 - Prob. 18.101CPCh. 18 - Prob. 18.102CPCh. 18 - Prob. 18.103CPCh. 18 - Prob. 18.104CPCh. 18 - Prob. 18.105CPCh. 18 - Prob. 18.106CPCh. 18 - Prob. 18.107CPCh. 18 - Prob. 18.108CPCh. 18 - Prob. 18.109GPCh. 18 - Prob. 18.110GPCh. 18 - Prob. 18.111GPCh. 18 - Prob. 18.112GP
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- The following is a portion of a protein: met-trp-tyr-arg-gly-pro-thr-Various mutant forms of this protein have been recovered. Using the normal and mutant sequences, determine the DNA and mRNA sequences that code for this portion of the protein, and explain each of the mutations. a. met-trp- b. met-cys-ile-val-val-leu-gln- c. met-trp-tyr-arg-ser-pro-thr- d. met-trp-tyr-arg-gly-ala-val-ile-ser-pro-thr-arrow_forwardIf an extra nucleotide is inserted in the first exon of the beta globin gene, what effect will it have on the amino acid sequence of the globin polypeptides? Will the globin most likely be fully functional, partly functional, or nonfunctional? Why?arrow_forwardA certain mRNA strand has the following nucleotide sequence: 5AUGACGUAUAACUUU3 What is the anticodon for each codon? What is the amino acid sequence of the polypeptide? (Use Figure 13-5 to help answer this question.) Figure 13-5 The genetic code The genetic code specifies all possible combinations of the three bases that compose codons in mRNA. Of the 64 possible codons, 61 specify amino acids (see Figure 3-17 for an explanation of abbreviations). The codon AUG specifies the amino acid methionine and also signals the ribosome to initiate translation (start). Three codonsUAA, UGA, and UAGdo not specify amino acids; they terminate polypeptide synthesis (stop).arrow_forward
- A sample of an unknown peptide was divided into two aliquots. One aliquot was treated with trypsin, and the other with cyanogen bromide. Given the following sequences of the resulting fragments, deduce the sequence of the original peptide. Trypsin treatment: Asn-Thr-Trp-Met-Ile-Lys Gly-Tyr-Met-Gln-Phe Val-Leu-Gly-Met-Ser-Arg Cyanogen Bromide treatment: Gln-Phe Ile-Lys-Gly-Tyr-Met Ser-Arg-Asn-Thr-Trp-Metarrow_forwardConsider the following peptide sequence: Lys-Leu-Ile-Cys-Lys What is the net charge of this sequence at physiological pH? a. -2 b. +1 c. 0 d. -1 e. +2arrow_forwardThe following steps were performed using enzyme cleavage of a peptide to determine its amino acid sequence. Step 1. FDNB yield DNB-Gly Step 2. Treatment with trypsin yield 3 fragments: Tyr-Leu-Asp-Arg; Gly-Ser-Ala-Lys; Trp-Gly-Ser-Met Step 3. Treatment with pepsin gave the same 3 peptide fragments. What is the sequence of the peptide?arrow_forward
- A polypeptide has the following sequence: Phe-Pro-Lys-Gly. Which of the following sequences in the coding strand of the DNA could code for this peptide? Select all that are correct. A) CTT-GGG-AAA-CCC-TAG B) TTC-CCG-AAG-GGA C) TTT-CCC-AAA-GGG-TGA D) UUC-CCA-AAG-GGU E) TTC-CCA-AAG-GGC F) AAA-GGG-TTT-CCC-ATTarrow_forwardWrite the anticodons for the following amino acids: a) Met b) Trp c) Ser d) Leuarrow_forwardUsing the genetic code provided what would be the corresponding polypeptide sequence for the DNA template sequence 5’-TAT-GGC-ATG-3’? Ile-Pro-Tyr Tyr-Gly-Met Val-Arg-Tyr Ile-Arg-Pro His-Ala-Ile Ile-Pro-Tyr Tyr-Gly-Met Val-Arg-Tyr Ile-Arg-Pro His-Ala-Ilearrow_forward
- What is the name of the process by which amino acids arelinked together in the correct order based on an RNA sequence?arrow_forwardWhich of the following would be considered a severe mutation? A) Leucine (Leu) > Lysine (Lys) B) Arginine (Arg) > Lysine (Lys) C) Histidine (His) > Arginine (Arg) D) Aspartic Acid (Asp) > Glutamic acid (Glu) E) Valine (Val) > Isoleucine (Ile)arrow_forwardWrite the standard base sequence of the messenger RNA that would cause a ribosome to make the following peptide: Met-Val-Asn-Tyr-Tyrarrow_forward
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