Each dot represents the joint evaluation of a tissue sample for 2 DNA repair proteins. The colors of the dots a, b, c, d, e, f, g represent tissues of groups A, B, C, D, E, F, G respectively, defined in Figure 10. Black lines represent mean values of expression of tissue sections from group A while red lines represent values of expression which are -2σ less than the mean values. Numbers in the small boxes show the mean and -2σ expression values. Dots that are below and to the left of the red lines have significantly reduced expression for both proteins being evaluated.