TP53 and neoplasm: First, the oncogenic potential of the 91 MYC binding partners was tested in the murine KPC cell line harbouring oncogenic mutations in KRAS and p53,34 because this cell line engrafts in C57BL/6J mice and forms MYC-dependent tumours.35 KPC cells were transduced with the library, then split and cultured without or with doxycycline to activate shRNA expression.