|William Blair & Co.||Y. Katherine Xu, Ph.D.|
|Griffin Securities||Keith A. Markey, Ph.D., M.B.A.|
|H.C. Wainwright & Co.||Edward White|
Synthetic Biologics, Inc. is followed by the analysts listed above. Please note that any opinions, estimates or forecasts regarding Synthetic Biologics, Inc.'s performance made by these analysts are theirs alone and do not represent opinions, forecasts or predictions of Synthetic Biologics, Inc. or its management. Synthetic Biologics, Inc. does not by its reference above or distribution imply its endorsement of or concurrence with such information, conclusions or recommendations.