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

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

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Structure and Properties of Peptides
The Ramachandran Plot illustrates the fact that

the peptide bond is planar
the F & Y angles can assume approximately three different values
the F & Y angles can assume only a single value in a protein
the F & Y angles can assume any value in a peptide

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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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