Figure 3. Diagram showing gene structure changes.
Number of genes that have been added, deleted or changed are shown over four different time frames: October 2002 (genome version 1) and 2005 (genome version 2), between 2005 (version 2) and September 2007 (version 2.1.4), between September 2007 (genome version 2.1.4) and February 2010 (version 2.1.4) and between February 2010 and March 2019 (version 3.2). The number of changed genes includes gene models that have been merged, split or had a deletion/addition of exons or change of exon boundaries.