Figure 2.

The size of the transcriptome, computed as the fraction of the total number of base pairs in the human genome covered by the assembled transcripts, for 16 normal human tissues included in the Illumina Body Map [98]. Each RNA-seq data set was mapped to the genome with TopHat [78] and assembled with Cufflinks [41]. Note that except for adrenal tissue, in which transcripts cover 5.3% of the human genome, all other reconstructed transcriptomes are smaller in size than the currently annotated transcriptome.