definiens: ) for the screening of certain Compounds ( as defined below ) by EVP in Drosophila models of Huntington 's Disease and other specific activities in furtherance thereof ; and WHEREAS, EVP completed the poe Research Activities contemplated by the poe Agreement to the satisfaction of the Parties, and duly exercised its Collaboration Option to enter into the Collaboration Agreement pursuant to the POC Agreement on July 12,2004 ; and WHEREAS, subject to the tenns and conditions hereof, the Parties desire to commence the Collaboration as set forth herein ; NOW THEREFORE, in consideration of the promises and undertakings set forth herein, and for other good and valid considemtion, the receipt and sufficiency of which is hereby acknowledged, the Parties agree as follows : ARTICLEl DEFINITIONS For purposes of this Agreement, the terms defined in this Article shan have the meanings specified below . The definitions of the terms herein shall apply equally to the singular and plural forms of the tenns defined