Special properties of NB1 cells are that they are highly mutated in comparison with other neuroblastoma cell lines (963 mutations), they only have single TP53 and CDKN1A copies, an extra copy of CDADC1 and they are the only ones in the tested set with ALK amplification (https://depmap.org/portal/interactive). This evidence concerns the gene TP53 and neuroblastoma.