Long-template PCR analysis and PicoGreen®staining of cybrids, ρ0-cells and SH-SY5Y cells: (A) Genomic DNA from SH-SY5Y, ρ0-cells, control and ADHD cybrids were amplified using both internal and external primers and subjected to electrophoresis on 0.6% agarose gel. Amplicons are absent in the PCR using external primers for ρ0 cells. (B) Punctated cytoplasm and nuclei are fluorescent in SH-SY5Y cells, control and ADHD cybrids, whereas in ρ0 cells only the nuclei exhibited green fluorescence by Pico-green staining. C6, C9, C10 and C11 are control cybrids, ADHD1, 5 and 6 are cybrids prepared using platelets of ADHD probands. Scale bar represents 10 μm.