TAN 1364B is a protein tyrosine phosphatase (PTP) inhibitor and the racemic and monomeric form of RK-682 . TAN 1364B inhibits the activity of the PTPs LMW-PTP, CDC25B, and PTP1B (ICs = 8.6, 12.4, and 0.7 µM, respectively), but the inhibitory activity against LMW-PTP and CDC25B is blocked in the presence of magnesium. TAN 1364B forms aggregates in solution and binds to both the PTP binding site and to protein surfaces.
TAN 1364B ((Rac)-RK-682)a racemate of RK-682, is a protein tyrosine phosphatases (PTPases) inhibitor. (Rac)-RK-682 inhibits protein tyrosine phosphatase 1B (PTP-1B), low molecular weight protein tyrosine phosphatases (LMW-PTP), and cell division cycle 25B (CDC-25B) with IC50s of 8.6 μM, 12.4 μM, and 0.7 μM, respectively.