Hi, Compara analysis has been added to the recent human and mouse pgp viewer updates. -human pgp viewer : 2011-08-03 -mouse pgp viewer : 2011-08-02 Again, a quick example of usage can be found here: http://pgpviewer.blogspot.com/2011/08/pgp-compara-multiple-assembly-analysis... any issues, questions, comments, please email pgp-help@sanger.ac.uk Will