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Sensory neurons of the trigeminal ganglion express both GABAA and GABAB receptors. GABAA receptor immunostaining of ganglion neurons is membrane associated (A1, red, arrows) while GABAB immunostaining is cytoplasmic (A2) The combined image (A3) shows some neurons are double labelled for GABAA receptor and GABAB receptor (A3, arrows). Scale bar = 30 μm
