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

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

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

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
the F & Y angles can assume approximately three different values

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Structure and Properties of Peptides
Secondary structure in protein refers to

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

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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, the proximal His, and a water molecule
four nitrogens of heme and to a water molecule

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