Figure 7.

Estimation of copy number of the spikes. The x-axis shows the expected copy number (in log₂) for the individual spiked in PCR fragments, and the y-axis shows the observed copy number for the same spiked in fragments. The linear fit (r² = 0.82) is only for spikes with expected copy number <64 (2⁶) because of the clear saturation above that point.