Tocris Bioscience (Bristol, UK) announced today the signing of an exclusive deal with AstraZeneca to supply Gefitinib (also known as Iressa™ and ZD1839) to preclinical researchers working on the mechanisms underlying cancer development. For the first time, scientists will be able to buy authentic, fully licensed, non-formulated Gefitinib as an off-the shelf product for use in biological research.