Expression of mGluR5 in superior frontal cortex of people with autism and matched controls. (A) Representative samples of metabotropic glutamate receptor 5 (mGluR5) from controls (C) and people with autism (A). (B) Mean mGluR5 dimer and monomer/neuron-specific enolase (NSE) ratios for people with autism (filled histogram bars) and controls are shown for Brodmann's area 9 (BA9). (C) Mean mGluR5/β-actin ratios for people with autism (filled histogram bars) and controls are shown for BA9. Error bars express standard error of the mean. **P < 0.05.