Figure 2.

Possible cases of TSS usage among tissues. Possible cases of TSS usage sharing the same static structure of TSS: (a) TSS usage is identical between tissues X and Y; (b) upstream sites are favored in tissue X whereas downstream sites are favored in tissue Y; and (c) some subregions exhibit distinct TSS usage between tissues. The CAGE tag count of each tissue at each position is displayed as a vertical line, where the x-axis indicates genomic coordinates or chromosomal location and the y-axis indicates the CAGE tag count. bp, base pairs; CAGE, cap analysis of gene expression; TSS, transcription start site.

Kawaji et al. Genome Biology 2006 7:R118   doi:10.1186/gb-2006-7-12-r118
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