Figure 1

Interaction entropy model for GST gene variations and prostate cancer risk. This graphical model, describes the percent entropy that is explained by each GST SNP or a combination of two loci within our study population. Positive percent entropy indicates information gain or synergy. However, negative percent indicates redundancy or lack of information gain. Schematic coloration used in the visualization tools represents a continuum from synergy (i.e. non-additive) to redundancy. The colors range from red representing a high degree of synergy (positive information gain), orange a lesser degree, and gold representing independence and a midway point between synergy and redundancy. On the other hand, green represents redundancy. Note that the gene combination effect is primarily driven by the GSTP1 loci attributed to the lack of additional information gain comparing the GSTM1-GSTP1 axis (IG = 0.04%) to either GSTP1 or GSTM1 loci alone (IG = 0.58% and 0.03%, respectively)