Structure and Properties of Peptides
In β-pleated sheet structures neighbouring

neighboring chains are connected by a-helices
chains lie in a flat plane
neighboring residues are hydrogen bonded
neighboring chains are hydrogen bonded

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

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

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