Pauling and Corey showed that in small peptides, six atoms associated with
 

the peptide bond all lie in a plane? a) What is the physical basis for the planar nature of the peptide bond
b) what evidence did Pauling and Corey use to support their claim
c) Draw a dipeptide of 2 amino acids in trans linkage (side chains shown as R) and indicate which 6 atoms are part of the planar structure of the peptide bond.