MYCN and neuroblastoma: Western blot analysis showed that the MYCN-amplified NB cell lines IMR32, KELLY, SK-N-BE(2), and CHP212 expressed high levels of the MYCN protein, while the non-MYCN-amplified NB cell lines expressed either c-MYC (SH-SY5Y and SK-N-AS) or a low level of MYCN (SK-N-FI) relative to the other cell lines (Figure S7).