Development Candidate means a Compound that meets the Development Candidate Criteria for the initiation of a Development Program for the treatment of CF, and which is the subject of a notice from Vertex to CFFT that Vertex intends to commence formal pre-clinical development of the Compound in the Field pursuant to the provisions of Section 3.1 hereof.
Product Candidate means, [***].
Soft Target means a target that will suffer minimum damage and cause minimum damage to the subject vehicle in the event of a collision.
Collaboration Target means the Initial Collaboration Targets set forth on Exhibit F and any Additional Target or Substitute Target that is selected in accordance with Section 3.3 of this Agreement.
Back-Up Compound means, with reference to any particular Development Candidate or Drug Product Candidate, a Compound which (a) has the same principal mode of action (i.e., Potentiator or Corrector) as that Development Candidate or Drug Product Candidate; and (b) was among the group of Compounds, identified by VERTEX as potential additional lead molecules having the same principal mode of action, from which the Development Candidate was selected.