DX-2400 was discovered using Dyax’s “gold-standard” phage display technology where Dyax applied its extensive selection and screening expertise to selectively block catalytic activity of a single protease within a larger and closely related family of enzymes. This antibody is another example of the superior functional selectivity available to validate novel biologic targets using Dyax’s phage display libraries.About Dyax’s Phage Display Dyax’s proprietary drug discovery technology, phage display, provides an efficient means to identify compounds that interact with a wide array of therapeutic targets. Dyax’s discovery capabilities have been further enhanced through automation, which has enabled the Company to evaluate a large number of molecules binding to each target. In this way, Dyax is able to rapidly identify and select a specific antibody, peptide or small protein with the desired biochemical and biological characteristics. Dyax’s state-of-the-art antibody phage display libraries allow for the rapid isolation of fully human target-specific antibodies from a library of billions of unique antibodies. These libraries are screened using in vitro selection strategies that are tailored to increase the yield of lead candidates with the desired therapeutic properties. 1,2 About Dyax Dyax is a fully integrated biopharmaceutical company focused on the development and commercialization of novel biotherapeutics for unmet medical needs. The Company’s lead product, ecallantide, has been approved under the brand name KALBITOR in the United States for the treatment of acute attacks of hereditary angioedema (HAE) in patients 16 years of age and older. Dyax is commercializing KALBITOR in the United States independently, and establishing strategic collaborations to develop and commercialize ecallantide for the treatment of HAE in key regions worldwide. Currently, Dyax has collaboration agreements for regions including Europe, Japan, Russia, the Middle East, Australia and New Zealand. Dyax is also exploring other potential indications for ecallantide, either alone or through collaborations.