POU5F1 and ovarian cancer: Remarkably, the human OCT4-pg3 (here OCT4P3, NR_036440.1), OCT4-pg4 (here OCT4P4, NR_034180.1) and OCT4-pg1 (here OCT4P1b NM_001159542.1) show homology to the entire OCT4 cDNA and share high structural and sequence homology to murine Oct4P4. Similar to Oct4P4 in mESCs, we found that human OCT4P3 lncRNA is enriched in the nuclei of OVCAR-3 and SKOV-3 ovarian cancer cells (Supplementary Fig. 8).