PMEL and melanoma: To determine whether the M-Mitf (encoding a melanocyte specific isoform of Mitf) and Pmel (encoding a type I transmembrane glycoprotein) genes, two genetic markers for melanocytes, are expressed in mouse meninges, RT-PCR was performed on meninges isolated from C57BL/6J, C57BL/6J-Tyrc-2J/Tyrc-2J and C57BL/6J-Mitfmi−vga9/Mitfmi−vga9 mice, using B16 mouse melanoma cells as a positive control.