“ Felbamate produced a rapid, concentration-dependent block … 50 microM NMDA and 10 microM glycine in human embryonic kidney 293 cells expressing the rat NR1a subunit, and either the NR2A, NR2B or NR2C … values for block were 2.6, 0.52 and 2.4 mM, respectively (holding potential, - 60 mV).”