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

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

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

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

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

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