Figure 1. Number of genes expressed in human TM/number of times genes were queried on chips. A: Number of genes queried on chips of 1, 2, 3, or 4 of the microarray studies of this meta-analysis (% of all 21,813 genes queried at least once). B: Among genes queried 2×, number of genes assessed to be expressed in TM 1× or 2× (% genes queried 2×). C: Among genes queried 3×, number of genes assessed to be expressed in TM 1, 2, or 3× (% genes queried 3×). D: Among genes queried 4×, number of genes assessed to be expressed in TM 1, 2,3, or 4× (% genes queried 4×).