  We point out that in extended supersymmetric models such as supersymmetric
left-right models, it is possible to have leptoquarks that explain the HERA
high $Q^2$ anomaly without giving up R-parity conservation. The leptoquarks
belong to vectorlike $(2, 2, \pm{4/3}, 3 or 3^*) $ representations of
$SU(2)_L\times SU(2)_R\times U(1)_{B-L}\times SU(3)_c$ (denoted $G_{2213}$).
Unlike the R-parity violating scenario, the leptoquarks are accompanied by new
superpartners,the leptoquarkino which leads to many intersting signatures in
other collider experiments. At Tevatron, pair productions of the leptoquarkino
will give rise to dilepton signals very distinct from the top productions.
These models can lead to unification of gauge coupling constants at a scale of
around $10^{10}$ GeV implying that grand unification group is not of the usual
SU(5) or SO(10) types but rather an automatically R-parity conserving
$SU(5)\times SU(5)$ GUT model recently proposed by one of the authors (R. N.
M.) which leads to a stable proton.
