Expression of various splice variants of mGluR1 and mGluR5 in mouse spinal cord dorsal horn. RT-PCR amplification of the alternatively spliced forms of mGluR1 (A) and mGluR5 (B) from total RNA prepared from dorsal horn of the mouse spinal cord and mouse cortex. The position of predicted band sizes for mGluR1a, mGluR1b, mGluR1d, mGluR1f, mGluR5a, and mGluR5b are indicated. Molecular markers are shown in base pairs.