Figure 1From: Estrogenic and mutagenic activities of Crotalaria pallida measured by recombinant yeast assay and Ames test Estrogenic response for extract of C. pallida leaves in the recombinant yeast assay. Different concentrations of extract of C. pallida leaves (μg/well) were added to genetically engineered, estrogen- responsive yeast cells and incubated for 6 h. The β-galactosidase activities were calculated as fluorescence units (FU). Values are averages of three independent experiments; bars indicate value ranges. Negative control, DMSO, FU = 355 ± 21; positive control, 17-β-estradiol, FU = 9834 ± 985.Back to article page