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

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

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Structure and Properties of Peptides
Secondary structure in protein refers to

protein made up of more than one polypeptide chain
regular folding of regions of the polypeptide chain
linear sequence of amino acids joined together by peptide bond
three dimensional arrangement of all amino acids in polypeptide chain

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