Examples of intronic and gapped expressed sequence tags. (A) An example of intronic expressed sequence tags (ESTs) showing 454 ESTs mapped to the gene, K09E2.3, which is added to a recent WormBase release (WS180) within the intron of K09E2.2. There are also other ESTs recently added that confirm K09E2.3. (B) An example of a gapped-EST suggesting alternative splicing or correction of the current gene model. Note that the genomic regions shown are not to the same scale.