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mRNA expression of group I mGluRs in human and rat CB. (A,B) Representative agarose gel images show the RT-PCR results of group I mGluR mRNA expression in human and rat CB. CB, left lanes in (A,B). RNA extracted from the human brain cerebral cortex was used as positive control (brain, middle lanes in A,B). An equal volume of the negative cDNA control was used in the PCR as PCR negative control (NC; right lanes in A,B). GRM, glutamate metabotropic receptor.
