Titration experiments confirmed that MYCMI-6 discriminates between MYCN-amplified and MYCN-non-amplified neuroblastoma cell lines cells, with average growth inhibition of 50% (GI50) values of 2.5–6 μM for MYCN-amplified cell lines and around 20 μM or higher for MYCN-non-amplified cell lines (Fig. 5B). Here, MYCN is linked to neuroblastoma.