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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- The doctor also mentioned a new treatment for Sickle Cell Disease to JJ called Voxelotor (Oxbryta). Voxelotor binds to the a-globin chain and alters the structure of HbS stabilizing it in the R-state (relaxed state). Q7: In the presence of Voxelotor would you expect the affinity of HbS for O2 to increase or decrease? Q8: How would you classify the mechanism of action for Voxelotor?arrow_forwardWhat would the order of elution be (first to last to come out of a size-exclusion chromatography column) for the mixture of myoglobin (17.7 kDa), hemoglobin (64.5 kDa), lysozyme (14.3 kDa) & albumin (67 kDa)? a. Albumin, hemoglobin, lysozyme, myoglobin Ob. Hemoglobin, myoglobin, lysozyme, albumin Oc. Lysozyme, myoglobin, albumin, hemoglobin Od. Albumin, hemoglobin, myoglobin, lysozymearrow_forwardA mother whose blood type is 'A-' gives birth to a baby with A+ blood type. The baby is diagnosed with erythroblastosis fetalis and needs an immediate transfusion. Which of the following blood types should the infant receive? (A) A+ (B) A- (C) AB- (D) O+ (E) O-arrow_forward
- (e) Two ADP agonists (drugs) were also found to bind to platelets: 2-methylthio-ADP bound with a Kp of 7 µM and 2-(3-aminopropylthio)-ADP bound with a Kp of 200 µM. Can these drugs effectively compete with ADP for binding to platelets? Explain your answer.arrow_forwardNormal Hgb is referred to as HbA and contains 4 subunits, 2 a-globin chains and 2 B-globin chains, arranged as two dimers of aß. In Sickle Cell Disease, both B-globin chains are altered in the dimers (aßS/aßS). Q3: Which level of structure does the aß/aß and aßS/aßS in HbA and HbS describe?arrow_forwardThe mutation in hemoglobin at B82 Lys → Asp results in lowered O,-binding affinity compared to normal hemoglobin. B82 is one of the residues that lines the 2,3-BPG binding site (see Figure 7.29; B82 is adjacent to His143). Based on the location of this residue and the differences between Lys and Asp, sug- gest a rationale for the observed reduction in Oz-binding affinity.arrow_forward
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