Question

Hill plot for binding of oxygen to myoglobin and hemoglobin

Answer 1

Each globin chain contains one heme-Fe2+, and each canbind O2, so a fully occupied hemoglobin molecule can bind 4O2 molecules. The O2 binding curve for hemoglobin follows a sigmoidal or S-shaped pattern (Lehninger pp.214-215). ... However, hemoglobin reaches saturation at similar pressures to myoglobin.

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