Figure 3

Examples of alternatively spliced genes from Entrez Gene at the NCBI. Of the seven classes of alternatively spliced genes, some classes are more likely to indicate annotation problems than others - particularly those genes having one or more sequence-disjoint transcripts. Parts-disjoint transcripts, on the other hand, are more suggestive of complex biology. Alternatively spliced genes having only overlapping transcripts (0:0:N) comprise the vast majority of instances.