definiens: means ( i ) any collection or library of polynucleotide sequences ( including w ithout limitation a CAT Library ), created by CAT and under the exclusive co ntrol of CAT, which encodes at least one Immunoglobulin and which is contained in filamentous bacteriophage and/or bacteriophage or phagemid cloning vectors ca pable of propagation in bacteria ; or ( ii ) any collection or library of bact eriophage ( including without limitation a CAT Library ), created by or under the exclusive control of CAT, wherein an Immunoglobulin is expressed as a fusion protein comprising an Immunoglobulin and an outer surface polypeptide of a bacteriophage . For the avoidance of doubt, and without expanding the defin ition thereof, specifically excluded from the definition of Licensed Antibody P hage Display Materials are ( x ) any article of manufacture or composition of -5- matter suitable for display, expression or secretio n of an Immunoglobulin in or from any organism or system other than bacteria and ( y ) any materials or composition of matter otherwise meeting the definit ion of Licensed Antibody Phage Display Materials but created by or under the control of any entity, other than CAT, engaged in a Commercial Antibody Phage Di splay Business ; provided that, notwithstanding the foregoing, any materials or composition of matter otherwise meeting the definition of Licensed Antibo dy Phage Display Materials but created by or under the exclusive control of a CAT Collaborator shall constitute Licensed Antibody Phage Display Material s, but only to the extent derived by such CAT Collaborator exclusively from L icensed Antibody Phage Display Materials created by or under the exclusive control of CAT and properly transferred by CAT to such CAT Collaborator in acco rdance with the applicable provisions of this Agreement and, with respect to s uch transfers after the Effective Date, such CAT Collaborator acknowledges that the transfer restrictions and other provisions hereof apply ther eto . shall not include any such artic le of manufacture or composition of matter infringing or arising out of the infringement of any Valid Claim of any patent or patent application under the control of CAT and which is excluded from the scope of any license grant made t o XOMA Technology Ltd