Humans 28 alternative RNA splicing 26 transcription elongation 26 human 24 priority journal 24 Alternative Splicing 20 RNA polymerase II 20 nonhuman 20 Alternative splicing 18 messenger RNA 18 Chromatin 14 exon 14 gene expression 14 RNA Polymerase II 12 RNA processing 12 Transcription, Genetic 12 article 12 chromatin structure 12 genetic transcription 12 genetics 12 intron 12 Animals 10 RNA Precursors 10 RNA splicing 10 controlled study 10 transcription regulation 10 Models, Biological 8 RNA Splicing 8 RNA translation 8 Review 8