Epigenetic features strongly associated with different types of AS. Epigenetic features strongly associated with different types of AS events are shown inside the circle of ESRP and ASSP. The features showing higher level and lower level in AS events than in CNE are colored in red and green, respectively. The features inside the dashed black box are those common in both ESRP and ASSP; note their association patterns are very different in between ESRP and ASSP. (ES (exon skipping), ME (mutually exclusive exon), A5SS (alternative 5' splice site selection), A3SS (alternative 3' splice site selection), IR (intron retention)).