Biochemistry
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 7, Problem 17P
Interpretation Introduction

(a)

Interpretation:

Among the given curves, the curve that represents the given perturbation is to be identified.

Concept introduction:

Proteins are the biomolecules which are composed of the long chain of amino acid residues. The protein which contains oxygen and is present in the red blood cells in the body is known as hemoglobin. It contains iron as well.

Interpretation Introduction

(b)

Interpretation:

Among the given curves, the curve that represents the given perturbation is to be identified.

Concept introduction:

Proteins are the biomolecules which are composed of the long chain of amino acid residues. The protein which contains oxygen and is present in the red blood cells in the body is known as hemoglobin. It contains iron as well.

Interpretation Introduction

(c)

Interpretation:

Among the given curves, the curve that represents the given perturbation is to be identified.

Concept introduction:

Proteins are the biomolecules which are composed of the long chain of amino acid residues. The protein which contains oxygen and is present in the red blood cells in the body is known as hemoglobin. It contains iron as well.

Interpretation Introduction

(d)

Interpretation:

Among the given curves, the curve that represents the given perturbation is to be identified.

Concept introduction:

Proteins are the biomolecules which are composed of the long chain of amino acid residues. The protein which contains oxygen and is present in the red blood cells in the body is known as hemoglobin. It contains iron as well.

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Comparison of Fetal and Maternal Hemoglobins.Studies of oxygen transport in pregnant mammals show that the O2-saturation curves of fetal and maternal blood are markedly different when measured under the same conditions. Fetal erythrocytes contain a structural variant of hemoglobin, HbF, consisting oftwo a and two g subunits (α2γ2), whereas maternal erythrocytes contain HbA (α2β2).   a)Which hemoglobin has a higher affinity for oxygen under physiological conditions, HbA or HbF? Explain.   b)What is the physiological significance of the different O2 affinities?   c)When all the BPG is carefully removed from samples of HbA and HbF, the measured O2-saturation curves (and consequently the O2affinities) are displaced to the left. However, HbA now has a greater affinity for oxygen than does HbF. When BPG is reintroduced, the O2-saturation curves return to normal, as shown in the graph. What is the effect of BPG on the O2affinity of hemoglobin? How can the above information be used…
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