MKI67 and neoplasm: Furthermore, depletion of SLC27A2 reduced tumor proliferation (Ki67 staining, p = 0.004, Supplementary Fig. 4d) and increased tumor apoptosis (cleaved Caspase-3 staining, p < 0.0001, Supplementary Fig. 4e) without altering MYCN expression (p = 0.4, Supplementary Fig. 4f).