Structure and Properties of Peptides
The oxygen binding curves of hemoglobin and myoglobin

allow maximum transfer of oxygen to the tissues
are a consequence of the quaternary structure of hemoglobin
are identical
both (a) and (b)

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Structure and Properties of Peptides
Hemoglobin has quaternary structure and is made up of

six polypeptide chains, two α-chains and four β-chains
two polypeptide chains, one α-chains and one β-chains
five polypeptide chains, two α-chains and three β-chains
four polypeptide chains, two α-chains and two β-chains

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Structure and Properties of Peptides
In deoxy hemoglobin (Hb), the Fe (II) is coordinated to

four nitrogens of heme and to a water molecule
two nitrogens of heme and to three His residues in Hb
two nitrogens of heme and to three water molecules
four nitrogens of heme, the proximal His, and a water molecule

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