  We construct supersymmetric SU(4)_C X SU(2)_L X SU(2)_R models with
spontaneously broken left-right symmetry (C-parity). The minimal supersymmetric
standard model (MSSM) can be recovered at low scales by exploiting the missing
partner mechanism. The field content is compatible with realistic fermion
masses and mixings, proton lifetime is close to or exceeds the current
experimental bounds, and supersymmetric hybrid inflation can be implemented to
take care of C-parity domain walls as well as magnetic monopoles, and to
realize the observed baryon asymmetry via non-thermal leptogenesis.
