Merus N.v.

Crucell Holland B.v.

Erwin Houtzager

Ton Logtenberg

Cornelis Adriaan De Kruif

Rui Daniel Pinto

Mark Throsby

Robert Arjen Kramer

Cornelis A Dekruif

Described are transgenic, non-human animals comprising a nucleic acid encoding an immunoglobulin light chain, whereby the immunoglobulin light chain is human, human-like, or humanized. The nucleic acid is provided with a means that renders it resistant to DNA rearrangements and/or somatic hypermutations. In one embodiment, the nucleic acid comprises an expression cassette for the expression of a desired molecule in cells during a certain stage of development in cells developing into mature B cells. Further provided is methods for producing an immunoglobulin from the transgenic, non-human animal.

Antibody producing non-human animals

Described are transgenic, non-human animals comprising a nucleic acid encoding an immunoglobulin light chain, whereby the immunoglobulin light chain is a common human, human-like, or humanized light chain. Further provided is methods for producing an immunoglobulin from the transgenic, non-human animal.

Antibody producing non-human mammals

The invention relates to the field of generating helper phages and phage display libraries for the identification of binding molecules. The invention provide chimaeric phages having a coat comprising a protein mixture. The protein mixture comprises a fusion protein having a proteinaceous molecule fused to a functional form of a phage coat protein and a mutant form of the phage coat protein, wherein the mutant form is impaired in binding to a host cell receptor. The invention further provides new phage collections, novel helper phages and methods and means for producing chimaeric phages, infectious phages and helper phages.

Chimaeric phages

A chimeric phage having a coat comprising a mixture of proteins. The mixture of proteins includes a fusion protein wherein a protein is fused to a functional form of a phage coat protein, and a mutant form of the phage coat protein characterized in that a phage having no wild type phage coat protein from which the mutant form is derived but having a coat comprising the mutant form and no copies of the functional form is less infectious than a phage comprising no wild type phage coat protein from which the mutant form is derived and having a coat comprising the mutant form and at least one copy of the functional form. Also, the associated phage collection comprising the chimaeric phage or an infectious phage containing at least one copy of a mutant form of a phage coat protein wherein the mutant form has lost the ability to mediate infection of a natural host by the infectious phage. Also a method for producing a phage particle. Also, a helper phage having a nucleic acid encoding phage proteins or functional equivalents for the assembly of the helper phage.

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Zeist, Netherlands

Erwin Houtzager