Inset A: Example of transcript pattern view. Exons are indicated by boxes and introns by lines. Exons/introns that are variants are indicated in blue colour. Browsing the cursor over various elements of a pattern displays pop-up's giving detailed information on the elements. The displayed pop-up in this example shows information on the polyA sites that maps to the alternate transcript pattern AT2; of these two polyA sites, the first one (located at gene position 9317) terminates the transcript pattern while the second one (located at gene position 9189) is skipped and is not used as a terminating polyA in the formation of this pattern. Inset B: Example snapshot of a portion of Ensembl gene display page to illustrate the integration of the AltTrans data in Ensembl genome annotation project.