CAGE replicate from THP-1 cells after 8 hours of lipopolysaccharide treatment. For each position with mapped tags, the logarithm of the number of tags per million (TPM) in the first replicate is shown on the horizontal axis, and the logarithm of the number of TPM in the second replicate on the vertical axis. Logarithms are natural logarithms.
Balwierz et al. Genome Biology 2009 10:R79 doi:10.1186/gb-2009-10-7-r79