Multiple cell lines were studied; the SKOV-3, OVCAR-3, CAOV-3 and KGN cell lines were analyzed most often, as visualized in Figure 4A. The cell lines originated from various types of ovarian tumors: the SKOV-3 cell line was derived from a serous cystadenocarcinoma, the OVCAR-3, CAOV-3 and HEY from high serous grade adenocarcinoma, and the KGN cell was a FOXL2-positive cell line derived from a granulosa cell tumor [40,43,44,45]. This evidence concerns the gene FOXL2 and cystadenocarcinoma.