Characteristics of the peptide bond
--The peptide bond has a partial double-bond character, that
is, it is shorter than a single bond, and is rigid and planar .
--This prevents free rotation around the bond between the
carbonyl carbon and the nitrogen of the peptide bond.
--However, the bonds between the α-carbons and the α-amino
or α-carboxyl groups can be freely rotated.
--This allows the polypeptide chain to assume a variety of
Polarity of the peptide bond
the -C=O and -NH groups of the peptide bond are uncharged, but
they are polar and involved in hydrogen bonding in secondary