Fig. 2.
Effects of various concentrations of spermine (A) and ifenprodil (B) at GluN1/GluN2B receptors containing GluN1 and GluN2B mutants. Experiments were carried out as described in the legend to Fig. 1 by changing the concentrations of spermine (25–250 μM) and ifenprodil (0.25–2.5 μM). Values are mean ± S.E.M. from at least five oocytes for each mutant.