BMP signaling mutants display normal or increased abundance of synaptic GluRs.

<p>Representative confocal images of GluRIIA (A) and GluRIIB (B) stainings from wild-type and <i>wit^A12/B11</i> animals. (A′ and B′) Quantification of GluRIIA (A′) and GluRIIB (B′) densities of wild-type and <i>wit^A12/B11</i> animals. (C and D) Quantification of GluRIIA (C) and GluRIIB (D) densities of wild-type and <i>mad^1/12</i> animals. (E) Quantification of synaptic GluRIIA and GluRIIB abundances in <i>smox</i> and <i>smox;babo</i> double mutants. Introduction of <i>babo</i> mutation in the <i>smox</i> mutant background increased the GluR levels toward those of the <i>babo</i> mutant. (F) Quantification of synaptic GluRIIA and GluRIIB abundances in <i>smox</i> and <i>med</i> mutants. A mutation in <i>med</i> increased the GluR levels from those of <i>smox</i> mutant. Error bars represent SEM. ###p<0.001 from unpaired t-test. Scale bar equals 20 µm.