Whole cell lysate from 7 MYCN amplified neuroblastoma cell lines was compared to two non-amplified neuroblastoma cell lines, immortalized retinal pigment epithelial cells, and three non neuroblastoma, non-neural crest origin cancer cell lines and found CAMKV protein to be exclusively expressed in the MYCN-amplified neuroblastoma cell lines (Figure 2B). This evidence concerns the gene CAMKV and neuroblastoma.