Correlation between TGF-beta signature probability and methyl cluster genes. The TGF-beta signature probability in ovarian cancer is strongly positively correlated with the average expression of the methyl cluster genes in 146 primary ovarian cancers (A), an independent set of 77 primary ovarian cancers (B), in the 39 established cell lines studied (C), and in the 17 primary cultured ovarian specimens (D). Diamond symbols in panel D represent the two pooled normal ovarian surface epithelium specimens.