definiens: means ( i ) any collection or li­brary of polynucleotide sequences, created by and under the exclusive control ofDY AX, which encodes at least one Immunoglobulin and which is contained in filamentous bacterio--3 - phage and/or bacteriophage or phagemid cloning vectors capable of propagation in bacteria ; or ( ii ) any collection or library of bacteriophage, created by or under the exclusive control of DY AX, wherein an Immunoglobulin is expressed as a fusion protein comprising an Immu­noglobulin or at least a functionally operating region of an antibody variable region and an outer surface polypeptide of a bacteriophage . For the avoidance of doubt, and without ex­panding the definition thereof, specifically excluded from the defmition of Licensed Antibody Phage Display Materials are ( x ) any article of manufacture or composition of matter suitable for display, expression or secretion of an Immunoglobulin in or from any organism or system other than bacteria and ( y ) any materials or composition of matter otherwise meeting the defi­nition of Licensed Antibody Phage Display Materials but created by or under the control of any entity, other than DY AX, engaged in a Commercial Antibody Phage Display Business ; provided, that, notwithstanding the foregoing, any materials or composition of matter other­wise meeting the definition of Licensed Antibody Phage Display Materials but created by or under the exclusive control of a DY AX Collaborator shall constitute Licensed Antibody Phage Display Materials, but only to the extent derived by such DY AX Collaborator exclu­sively from Licensed Antibody Phage Display Materials created by or under the exclusive control of DY AX and properly transferred by DY AX to such DY AX Collaborator in accor­dance with the applicable provisions of this Agreement and such DY AX Collaborator ac­knowledges that the transfer restrictions and other provisions hereof apply thereto