(A) Mean "reference control" pattern of probe amplification established from 10 normal individual samples. Each probe is represented on the horizontal axis in the order of their size. The normalized peak heights are expressed in percentages on the vertical axis. (B) Two standard deviations above and below the mean peak height (normalized to one) for each probe are shown and validate the scoring of deletion/amplification within the: 0.7–1.3 ranges. Standard deviations are generally bigger for larger probes.