Human and yeast subsets of average transcript lengths significantly lesser than that of the corresponding global set.

The P-value of Equation (11) is calculated for the average transcript length in nucleotides of each human or yeast subset of genes relative to the average transcript lengths of  = 2,480 and 1,621 nt of the human and yeast global sets of N = 4,109 and 3,620 transcripts, respectively. The subsets of human transcripts that are most abundant in both the normal brain and GBM tumor are considered at each of the overexpression cutoffs of .