HAS1, HAS2 and HYAL3 expression levels showed to be comparable in all adenocarcinoma cell lines SKOV-3, Caov-3 and SW 626 cells, whereas the teratocarcinoma cell line PA-1 cells expressed higher levels of all the three genes (Figs. 3a, b, e). This evidence concerns the gene HAS1 and teratocarcinoma.