A Realistic Superunification
  It is argued that every quark flavor can be described as a lepton that has been excited by the absorption of a supernatural field, which is defined. In this context, a minimal irriducible representation of SUSY SU(5) is constructed exclusively of the chiral modes that correspond to three generations of leptons (or quarks) and their scaler superpartners. The proposed model predicts a new quark; a left-handed (non-strange) version of the strange quark. 
J. Towe