def METHOD_NAME(prev_res, residue, next_res):
  (c1, n2, ca2, c2, n3) = get_phi_psi_atoms(
    prev_res=prev_res,
    residue=residue,
    next_res=next_res)
  if (not None in [c1, n2, ca2, c2, n3]):
    return [c1.i_seq, n2.i_seq, ca2.i_seq, c2.i_seq, n3.i_seq]
  return [None] * 5