Metabotropic glutamate receptors promote disinhibition of olfactory bulb glomeruli that scales with input strength.
Zak JD, Whitesell JD, Schoppa NE. Metabotropic glutamate receptors promote disinhibition of olfactory bulb glomeruli that scales with input strength. J Neurophysiol. 2015 Mar 15; 113(6):1907-20.