FKBP1A and neuroblastoma: Among those cell lines, knockout of the BMP pathway repressor FKBP1A (the top sensitizer in our CHP-134 genome-wide screen) was, on average, the 4th most potent sensitizer to ATRA in the neuroblastoma cell lines (Fig. 2C; ranked by MAGeCK RRA score27), further indicating that perturbation of BMP signaling broadly affects ATRA response.