Phi Psi Coordinates

• Left handed a-helix coordinates

  Phi = ~40

  Psi = ~30-70
• Right Handed a-helix coordinates

  Phi = -180 to -40

  Psi = ~ -60
• Antiparallel B-sheet coordinates

  Psi = ~ 180-90

  Phi = ~140
• Parallel B-sheet coordinates

  Psi = ~180-90

  Phi = ~90
• Right Twisted B-sheet Coordinates

  Psi = 180-90

  Phi = ~100-60
• triple helix coordinates

  Phi = ~ -51

  Psi = ~153