Figure 4. ALK is highly expressed and the kinase is phosphorylated in neuroblastoma cell lines harboring activating mutations.
a. Relative ALK expression of neuroblastoma cell lines and fetal brain is shown and was determined using the 2-ΔΔCt method49. Statistical significance was determined by unpaired T-test. b. Immunoblots showing differential ALK expression in neuroblastoma cell lines with phosphorylation of the tyrosine 1604 codon restricted to cell lines with mutations (the wild-type lines NBEC1 and NB1771 show faint phosphostaining).