Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
expand_more
expand_more
format_list_bulleted
Question
Chapter 2, Problem 32P
Interpretation Introduction
Interpretation:
All L amino acids have an S absolute configuration except L-cysteine, which has the R configuration. L-cysteine is designated as having the R absolute configuration needs to be explained.
Concept introduction:
Amino acids are so named because they all are weak acids. All amino acids have at least two dissociable hydrogens, (diprotic), and some have three dissociable hydrogens and are triprotic.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Accepting. Which of the following compounds readily accepts amino
groups from amino acids?
a. Glutamine
b. Isocitrate
c. Malate
d. a-Ketoglutarate-Ketoglutarate
Pro-Ser-Ala-Phe-Glu. Draw this peptide at pH 7 and include its stereochemistry.
Be sure to answer all parts.
Draw the s-trans and s-cis conformations of the peptide bond in the dipeptide Ala-Ala. Be sure to show
appropriate stereochemistry for the natural amino acid and the alkenes.
I
I
I
I
I
draw structure...
s-trans
draw structure ...
s-cis
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
Knowledge Booster
Similar questions
- Be sure to answer all parts. Give the amino acid sequence of an octapeptide that contains the amino acids Val, Met, Asp (2 equiv), Phe, Trp, Ile, Lys, and forms the following fragments when partially hydrolyzed with HCl: Ile-Asp-Phe, Lys-Met-Val-Trp, and Phe-Asp-Lys-Met. Trp Leu Phe Leu Val Lys Gly Tyr Xarrow_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_forwardOn the trail of carbons. Tissue culture cells were incubated with glutamine labeled with 15NN in the amide group. Subsequently, IMP was isolated and found to contain some 15N.N. Which atoms in IMP were labeled?arrow_forward
- an inorganic ion. Such as metal ion, that improves the fit of an enzyme with its substrate is a(n)?arrow_forwardcotton. Which aspect of the structure of cellulose accounts for its strength? Cellulose is an abundant structural polysaccharide found in plant cell walls, wood, and interchain hydrogen bonding between extended molecular chains repeating unit of N-acetylglucosamine a(1→4) linkages between glucose units branches that occur every 12-30 residues forms a helical conformation in water Which of the following is not correct about chitin? fundamental constituent of the exoskeletons of crustaceans, insects, and spiders b) chitin chains form extended ribbons that pack side-by side a) similar to cellulose but with repeating units of N-acetyl-D-glucosamine c) d) found mainly in the liver in humans, making up as much as 10% of liver mass stacked sheets of chitin strands are stabilized by intrastrand, interstrand, and intersheet hydrogen bondsarrow_forwardPeptide mass determination. You have isolated a proteinfrom the bacterium E. coli and seek to confirm its identityby trypsin digestion and mass spectrometry. Determinationof the masses of several peptide fragments has enabled youto deduce the identity of the protein. However, there is adiscrepancy with one of the peptide fragments, whichyou believe should have the sequence MLNSFK and an(M 1 H)1 value of 739.38. In your experiments, yourepeat edly obtain an (M 1 H)1 value of 767.38. What isthe cause of this discrepancy and what does it tell youabout the region of the protein from which this peptide isderived?arrow_forward
- Sweet proteins. List the key classes of glycoproteins, their defining characteristics, and their biological functions.arrow_forwardBe sure to answer all parts. Give the amino acid sequence of an octapeptide that contains the amino acids Lys, Pro, Tyr, Ile (2 equiv) , Gln, Trp, Phe, and forms the following fragments when partially hydrolyzed with HCl: Lys–Ile-Phe-Pro, Phe-Pro-Gln-Tyr, and Trp-Ile-Lys.arrow_forwardIonization State of Histidine.Each ionizable group of an amino acid can exist in one of two states, charged or neutral. The electric charge on the functional group is determined by the relationship between its pKa and the pH of the solution. This relationship is described by the Henderson-Hasselbalch equation. 1.Histidine has three ionizable functional groups. Write the equilibrium equations for its three ion-izationsand assign the proper pKa for each ionization. Draw the structure of histidine in each ionization state.What is the net charge on the histidine molecule in each ionization state? 2.Which structure drawn in (1) corresponds to theionization state of histidine at pH 1, 4, 8, and12?Note that the ionization state can be approximated by treating each ionizable group independently. 3.What is the net charge of histidine at pH 1, 4, 8, and 12? For each pH, will histidine migrate to-ward the anode (+) or cathode (-) when placed in an electric field?arrow_forward
- - Keto counterparts. Name the a-ketoacida-ketoacid that is formed by the transamination of each of the following amino acids: Co, a. Alanine b. Leucine c. Aspartate d. Phenylalanine e. Glutamate f. Tyrosinearrow_forwardNo plagiarism please. Use your own words. Thanks. Discuss the preferred locations of different classes of amino acids in transmembrane proteins. Explain the formation of thioether-linked prenyl anchor proteins. Explain the structure of caveolae.arrow_forwardtrue or false1. In the structural characteristics of a nucleotide, the phosphate subunit is bonded to the sugar subunit.2. In the structural characteristics of a nucleotide, the nitrogenous base subunit is bonded to the phosphate subunit.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- BiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage Learning
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning