A diagram of the residues defining the binding site of 2,3-bis-phosphoglycerate (BPG) is2. (shown on the right. Given the mutation in Hb Great Lakes, Leu(B68)His, show on either O2 binding plotwhether its p(O2)50% will be altered in the presence of a 10-fold excess of BPG and in which directionwith respect to that of HbA. Explain.B1B1-subunitHis 143Lys82His 2BPGa-NH,*a-NH,*B2-subunitLys 82His 2His 143B2

2,3 bis phosphoglycerate (BPG) is an allosteric regulator of Hb. BPG binds to central cavity of…

Answered: 2. (: A diagram of the residues…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Describe the mechanism of action of 1 cycle of the ubiquitin (Ub) ligase system. Describe how the E1, E2 and E3 ligases work to covalently link Ub to the target protein, including which uses an energy source (and how), and the operative amino acids on the enzymes, Ub and target protein
10. In an abnormal hemoglobin variant known as Hemoglobin-Kariya, the lysine residues at position 40 in the ß-chains are replaced by glutamic acid residues. a) What effect would you expect this change to have on the quaternary structure and oxygen binding properties of hemoglobin? b) Draw a diagram to illustrate the difference in the oxygen binding curves that would be obtained with normal hemoglobin and Hemoglobin-Kariya.
1.Substituents exhibit strong steric repulsion at the GABAA receptor ？what does it means？？ 2. Substitutions at C-6, C-8, and C-9 lower the activity？where is C-6, C-8, and C-9 ？can anyone help to lable out？
Compare and contrast the c4 pathway and the malate–aspartate shuttle in bullet format, meaning list the similarities and differences.
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The action of this enzyme found in Beano alpha-galactosidase can also according to many sources be used to remove ____________ from the red blood cells of the B blood group and convert them to the O blood group. Since the _________ molecules (composed of many monomers) are connnected to protein on the membrane and also the cell membrane of the red blood cell itself; therefore these molecules help create cell identity and recognition, and when the are connected to proteins they are known as _________ , but if they are connected to the cell membrane itself they are known as ____________. This is a good question for reviewing the structures on the cell membrane as well. The only difference between the B-blood type and the O-blood type is ________. The following is a diagram of the differences of these molecules that determine blood type. List of answers: disaccharid, proteins ,dehydration synthesis ,nucleotide ,amino acids ,nucleic acids ,lactose ,fructose ,sucrose ,hydrolysis…
2. The diagram to the right shows the change in the structure of the C-terminal portion of each of the ẞ-subu- nits of human hemoglobin (HbA) in the oxyHb to deox- yHb or R-to-T transition. The hydrogen bonding interac- tion of the C-terminal ẞHis 146 residue with the side chain of Asp94, highlighted by the red ellipse, has been shown to be responsible for a major portion of the proton uptake associated with the Bohr effect. Treatment of HbA with the enzyme carboxypeptidase A (CPA) results in loss of the C-terminal ẞHis 146 and ẞTyr145 residues of the ẞ- subunits. (a) ( ) Draw a Hill plot [log(Y/[1-Y]) vs. log(pO2), Y = fraction of heme groups occupied by O2] to compare the values of the Hill coefficient nн and the O2-binding affinity at pH 7.4 of normal HbA before and after treat- ment of with CPA. (b) (' ) How will the plot for CPA-digested HbA change at pH 7.2? (c) 1 Hi5146 HN- ✓ Low PK B-chain. CH2 CH-NH-CO-CH-NH- CH₂ Tyr145 он HbO2 or R state Туг145 CH-CH2- OH co NH CH CH₂ His…

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