原始阶段的 RNA 如选用T 而没用U 的话 真核生物 就不可能选 poly(A)(+) tail 了 由于 poly(A)(+) tail 早在 那以后很快由于 RNA editing within post-transcriptional event 中出现Chaotic/Random/Tight binding T==A 被淘汰了 或成了SF movie里的allian DNA喽 (possibile) 正好有篇今年的paper Nat Biotechnol. 2012 Feb 12;30(3):253- Comprehensive analysis of RNA-Seq data reveals extensive RNA editing in a human transcriptome. by Peng Z. et al Abstract RNA editing is a post-transcriptional event that recodes hereditary information. Here we describe a comprehensive profile of the RNA editome of a male Han Chinese individual based on analysis of ~767 million sequencing reads from poly(A)(+), poly(A)(-) and small RNA samples. We developed a computational pipeline that carefully controls for false positives while calling RNA editing events from genome and whole-transcriptome data of the same individual. We identified 22,688 RNA editing events in noncoding genes and introns, untranslated regions and coding sequences of protein-coding genes. Most changes (~93%) converted A to I(G), consistent with known editing mechanisms based on adenosine deaminase acting on RNA (ADAR). We also found evidence of other types of nucleotide changes; however, these were validated at lower rates. We found 44 editing sites in microRNAs ( miRNAs), suggesting a potential link between RNA editing and miRNA-mediated regulation. Our approach facilitates large-scale studies to profile and compare editomes across a wide range of samples. //www.ncbi.nlm.nih.gov/pubmed/22327324 more RNA-seq relative papers: please go to //woldlab.caltech.edu/wiki/publications or //woldlab.caltech.edu/rnaseq above Nat Biotechnol. 2012 Feb 12;30(3):253- is from: HTTPS//sites.google.com/site/kistaimlab/home/hotrnd/highimpactpapers