Differences in expression of proteins associated with gamma Group 1 mGluRsConnexins Cx36 Cx32 Expression of two distinct connexins in 6 interneurons from RT- PCR Venance et al PNAS, 2001 20 mV 4 mV 100 ms Electrical coupling 10 s 100 pA tACPD Type I Type II Type III Type IV Single cell RT-PCR for mGluR1 & mGluR5 % Of Cells mGluR 1 5 1+5 1 5 1+5 Van Hooft et al, J Neurosci 2000