Peptidream Inc. and Genentech Inc., a Roche Holding company, signed a deal worth up to $1 billion to discover and develop macrocyclic peptide-radioisotope (peptide-RI) drug conjugates. Peptidream, of Kawasaki, Japan, will use its peptide discovery platform system technology to discover, optimize and develop macrocyclic peptide candidates for use as peptide-RI drug conjugates against targets of interest to Genentech. Genentech will pay Peptidream an up-front payment of $40 million and up to $1 billion in potential development, regulatory, and commercial-based milestones. In addition, Peptidream is eligible to receive tiered royalties on net sales (ex-Japan) of any products arising from the collaboration.