Art Stellar, former Supt of Schools, Burke, Co how to buy priligy in usa Given gene expression data _, which includes n genes and m samples with two conditions to study aberrant signal pathway transduction between conditions, we derive gene potential _ theta_ defined as the sum of pathway gene differential expression z scores between the two types 37; edge potential _ theta_ theta_ defined as the sum of z scores calculated from the statistical significance of Pearson s correlation between interacting genes 38; and flow potential _, defined as a proportionally score reflecting the concordance between a pathway and prior information regarding cellular location 39