Figure 1

Set 1 and Set 2 sample oligos. Set 1 sample oligos are chosen as a pair for each probe on the microarray, where one is the probe target (green) and the other is its closest nontarget (red). Set 2 sample oligos are also chosen as a pair, but one is both the target and closest nontarget of two probes and can be used to establish a comparison basis between the two probes.