Figure 1From: Concentration of endogenous estrogens and estrogen metabolites in the NCI-60 human tumor cell linesChromatograms showing the eight quantified endogenous estrogen metabolites for (a) the ovarian cancer cell line SK-OV-3 and (b) the colon cancer cell line HCC-2998. 16-ketoE2, 16-ketoestradiol; 16α-OHE1, 16α-hydroxyestrone; 2-MeOE1, 2-methoxyestrone; 2-MeOE2, 2-methoxyestradiol; 2-OHE2, 2-hydroxyestradiol; E1, estrone; E2, estradiol; E3, estriol.Back to article page