Figure 1
From: Profiling ascidian promoters as the primordial type of vertebrate promoter
Sequence logo around the ascidian transcription start sites. (A) All the 6312 promoter sequences were aligned around the representative TSSs with consideration of their transcriptional orientation. The pyrimidine-purine (YR) consensus was also observed in the ascidian genome. The TSS is located at position 0. (B) A similar alignment of the 5' ends of the first exons of all the 8753 trans-spliced transcripts is also shown. In this case, the position 0 means the most 5' end of the exons. Splice acceptor sequences, which are replaced with SLs in the trans-splicing reaction, can be observed. The whole replaced sequences are also known as outrons.