  In this paper, a representation of fermions in the Pati-Salam model is
suggested. The semi-leptonic and beyond standard model flavor changing neutral
currents of the Lagrangian in this representation of fermions are discussed. A
pair of possible Cabibbo-Kobayashi-Maskawa and Pontecorvo-Maki-Nakagawa-Sakata
matrices are defined. An effective Lagrangian for this model is given.
