Results of Surveys on US ATryn Partnership Timing of partnership (survey #7): Q: When will GTC ink a partnership deal for ATryn commercialization and clinical development in the US? 2007: 22% 1H08: 56% 2H08 or later: 12% Never: 10% Identity of partner (survey #8) Q: Who will be GTC’s U.S. ATryn partner? GENZ 23% PFE 9% NVS 8% NVO 6% WYE 6% BAX 4% Bayer 4% JNJ 4% ZGEN 4% AMGN 2% DNA 2% GSK 2% Shire 2% SNY 2% Talecris 2% Some other company: 9% Nobody: 8% Partnership terms (survey #9): Q1: The amount of up-front money will be: <$10M: 55% $10-19M: 39% $20M or more: 6% Q2: Cumulative milestones for the HD indication will be: <$10M: 32% $10-19M: 48% $20M or more: 19% Q3: CLINICAL and REGULATORY milestones for the DIC indication will be: <$50M: 35% $50-99M: 42% $100M or more: 23% Q4: SALES-based milestones for the DIC indication will be: <$50M: 16% $50-99M: 42% $100M or more: 42% Q5: The TOTAL amount from the four questions above will be: <$100M: 13% $100-249M: 55% $250M or more: 32% -- Comments are welcome on any of the above. Thanks to all of the survey participants for participating.