  We discuss the minimal theory for quark-lepton unification at the low scale.
In this context, the quarks and leptons are unified in the same representations
and neutrino masses are generated through the inverse seesaw mechanism. The
properties of the leptoquarks predicted in this theory are discussed in detail
and we investigate the predictions for the leptonic and semi-leptonic decays of
mesons. We study the possibility to explain the current value of
$\mathcal{R}_K$ reported by the LHCb collaboration and the value of the muon
anomalous magnetic moment reported by the Muon $g-2$ experiment at Fermilab.
