This excerpt taken from the BMY 10-Q filed Apr 28, 2009.
In January 2009, the Company and ZymoGenetics, Inc. (ZymoGenetics) entered into a global codevelopment arrangement in the U.S. for PEG-Interferon lambda, a novel type 3 interferon for the treatment of hepatitis C. Under the terms of the arrangement, the Company paid ZymoGenetics $105 million in 2009 which was expensed as research and development. ZymoGenetics will fund the first $100 million of global development for PEG-Interferon lambda after which, ZymoGenetics will fund 20% of development costs in the U.S. and Europe and the Company will fund 100% of the development costs in the rest of the world. If ZymoGenetics elects to continue sharing development and commercialization costs in the U.S., ZymoGenetics will share 40% of U.S. profits/losses and has an option to copromote in the U.S. Failing such election to fund development costs in the U.S., ZymoGenetics receives royalties on U.S. sales. In addition to royalties on non-U.S. sales, the Company could pay up to $430 million if all hepatitis C development and regulatory milestones are met, up to $287 million if development and regulatory milestones for other potential indications are met and up to an additional $285 million if all sales-based milestones are met.