New in PE 2.80 (May 2007)
New in PE 2.77 - 2.79 Beta (December 2005 - July 2006)
New in PE 2.75 - 2.76 Alpha (June - July, 2005)
New in PE 2.7-2.721 Alpha (February-March, 2005)
New in PE 2.45 Beta (January, 2005)
New in PE 2.4 - 2.411 Beta (June - September, 2004)
New in PE 2.2-2.3 Alpha (April-May, 2004)
New in PE 2.1 Alpha (July, 2003)
What's New in Protein Explorer 2?

Detailed list of changes in this version and previous versions.