among the ligands for gabab sites , the affinity for ( - ) , ( + ) and ( +/- ) baclofen , gaba and beta-phenyl gaba increased 2-6 fold in the presence of 2.5 mm mncl2 , in comparison with that in hepes-buffered krebs solution ( containing 2.5 mm cacl2 and 1.2 mm mgso4 ) , whereas that for muscimol was decreased to one-fifth .
C0004609
baclofen
C0016904
gaba