#Id: 7679
Because they cannot rotate, each peptide bond holds 6 atoms in a plane.
However, most possible angles of Phi (φ) and Psi (ψ) are impossible due to clashes
between atoms. These balls are much smaller than the atoms they represent.
#Unit 1. Molecules and their Interaction Relevant to Biology
#Ramachandran Plot
#Part B Pointers
