definiens: Field of Collaborative Research " means the specific programs, targets, and assays that are selected by the JRDC contingent upon written approval by Onyx and [COMPANY] for discovering either ( a ) inhibitors of Ras Pathway and Ras Function, or ( b ) modulators of the activity of targets in the Additional Cancer Targets or in the Collaborative Cancer Programs . As of the Effective Date, the Field of Collaborative Research shall be as described on the attached Exhibit B, which shall be amended by the Parties as the specific programs, targets, and assays within the Field of Collaborative Research are modified and updated by the JRDC pursuant to Section 5.6 or 6.1 . The Field of Collaborative Research shall not include any molecular entities, programs, targets, or assays that are not involved in the Ras Pathway or Ras Function, or in the Additional Cancer Targets, or targets in the Collaboration Cancer Programs