Biochemistry: Concepts and Connections (2nd Edition)
Biochemistry: Concepts and Connections (2nd Edition)
2nd Edition
ISBN: 9780134641621
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
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Chapter 7, Problem 13P
Interpretation Introduction

Interpretation:

The mutation in hemoglobin at β82Lys→ Asp results in lowered O2-binding affinity compared to normal hemoglobin.

Concept Introduction:

Hemoglobins have two α chains and two β chains. When O2 binds hemoglobin there is a transition in the hemoglobin structure from the low-affinity, tense (T) state to the high-affinity, relaxed (R) state. Binding of oxygen to hemoglobin follows an allosteric mechanism which is regulated by positive effectors which includes higher proton concentration or low.

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