gaba 0 nM gabaGABABR 0 nM gabaGABABRGi 0 nM gabaGABABRGibg 0 nM GABABR 400 nM GABABRGi 0 nM Gi 2600 nM GiaGDP 0 nM GiaGTP 0 nM GiaGTPRGS 0 nM Gibg 0 nM GIRK 0 nM GIRKGibg 0 nM GIRKGibg2 0 nM GIRKGibg3 0 nM GIRKGibg4 0 nM RGS 1000 nM VGCC 0 nM VGCCGibg 0 nM