CP-Like Symmetry, Family Replication, Charge Quantization
  We propose that the physics beyond the standard Weinberg-Salam model is such that matter and the CP conjugate anti-matter fields have the same set of charges with respect to the various force groups (upto ordering). We show that this CP-like symmetry leads to an understanding of family replication. We use anomaly constraints to infer the fermion spectra that lead to automatic electric charge quantization. We also find that the unification of coupling constants is possible at $M_{U} = 2 \times 10^{15} GeV$. 
Ravi Kuchimanchi