definiens: _ _ _ " shall mean _ _ _ _ _ _ _ _ ~ _ _ _ _ [COMPANY] - Sunesis Collaborntion 41 I ) = Confidential Treatment Requested UC - lOOAU 32113/99 \lJS 10/029,30 $ SU - lOO US 091105,372 09/981,541 ) SU-100DICI US 10/043,833 Biogcn·Sunesis Collaboration EXHIBIT 1.28 Sunesis Core Technology Pharmacophore Recombination For the Identification of Small Molecule Drug Lead Compounds Phannacophore Recombination For the Identification of Small Molecule Drug Lead Compounds Recombination For the Identification of Drug Lead CompoundU Recombination For Drug Lead of Recombination For the Identification of Drug Lead CompoundS, ( Recombination For Drug Lead of Recombination For the Identification of Drug Lead CompouncID Recombination For of Drug Lead Methods for Rapidly Identifying Small Organic Molecule Ligands for Binding to Biological Target Molecules \Meth'ods for Rapidly Identifying Small Organic Molecule Ligands for Binding to Biological Target Mo]ecul~ Methods for Rapidly Identifying Small Organic Molecule Ligands for Binding to Biological Target Molecules ! b4,ethods for Rapidly Identifying Small Organic Molecule for Binding to Biological Target Molecule§ ) I,¢~~~~~s for Rapidly Identifying Small Organic Molecule for Binding to Biological T : uget Moleculeij for Rapidly Identifying Small Organic Molecule for Binding to Biological Target MoJecul~ lli\.ethods for Rapidly Identifyin g Small Organic Molecule Ligands for Binding to Biological Target MoleculeS ] Rapidly Identifyin g Small Organic Molecule for Binding to Biological Target MoJecul.;u 42 Andrew C. Braisted Wel~ Erlans~ 1 = Confidential Treatment Requested, /,U.Z300P ] Biogm - Sunesis Collaboration, Ext ~ ded Tethering Approach for Rapid Identification of Ligand~