Modified Pati-Salam Model from $Z_7$ orbifolded AdS/CFT
  We consider models built on $AdS_5\otimes S^5/\Gamma$ orbifold compactifications of the type $IIB$ superstring, where $\Gamma$ is the abelian group $Z_n$. An attractive three family $\mathcal{N}=0$ SUSY model is found for $n=7$ that is a modified Pati--Salam Model which reduced to the Standard Model after symmetry breaking. 
James B. Dent, Pasquale L. Iafelice, Thomas W. Kephart