Relationship of miR-31 and GNA13 in breast cancer tissues. GNA13 mRNA expression shows an inverse correlation to pri-miR-31 expression in breast cancer tissues. Real time PCR was performed in a breast cancer array of 48 samples using specific primers for Pri-miR-31 and GNA13. (A) Tumor tissues were grouped into two groups based on their Pri-miR-31 expression relative to normal tissues. GNA13 mRNA expression in the respective tissues is plotted in the y-axis in log scale as shown. (B) An XY plot showing relative Pri-miR-31 expression in the x-axis and relative GNA13 expression in the y-axis, on log scale (correlation = −0.7) (*, p < 0.05).