Bioinvent International Ab

Roland Carlsson

Carl Borrebaeck

Ann-Christin Malmborg Hager

Christina Furebring

Carl A Borrebaeck

Anki Malmborg

Eskil S&ouml;derlind

Rebecka Ingrid Ottosson

Ulf Hans Soderlind

Susanna Moller

Lena Danielsson

Marta Duenas

A method for selecting nucleic acid sequences encoding ligand and receptor molecules capable of specific binding to each other is disclosed in which nucleic acid encoding ligand or receptor molecules is expressed in a host microorganism in combination with a surface molecule, such as pili, so that the ligand or receptor are displayed on the surface of the host microorganism. A replicable genetic unit, such as a filamentous bacteriophage, is used to display candidate binding partners to the ligand or receptor, with the binding of the ligand or receptor to the candidate binding partner mediating the transfer of nucleic acid from the replicable genetic unit to the microorganism. The method can be highly selective as the host microorganism is modified so that it does not display the surface molecule other than as a fusion with the ligand or receptor molecule. The method is rapid and simple and opens up new applications based on the detection of ligand and receptors where both are unknown.

Combined ligand and receptor display

The present invention relates to a method for in vitro evolution of protein function. In particular, the method relates to the shuffling of nucleotide segments obtained from exonuclease digestion. The present inventors have shown that polynucleotide fragments derived from a parent polynucleotide sequence digested with an exonuclease can be combined to generate a polynucleotide sequence which encodes for a polypeptide having desired characteristics. This method may be usefully applied to the generation of new antibodies or parts thereof having modified characteristics as compared to the parent antibody.

Method for in vitro molecular evolution of protein function using

Method of selecting specific bacteriophages

A method for the removal of, for in vitro immunization, undesired cells from human lymphocyte containing cell populations is disclosed. For the method, use is made of lysosomotropic agents which are caused to act in vitro on human lymphocyte containing cell populations. Also disclosed is a method in the in vitro immunization of lymphocytes for use in the production of human monoclonal antibodies. In this method, lysosomotropic agents are caused to act in vitro on human lymphocyte containing cell populations for removing cell populations having a negative effect on the in vitro immunization, whereupon the lymphocytes are in vitro immunized antigen-specifically and immortalized. Finally, a kit for in vitro immunization of lymphocytes for use in the production of human monoclonal antibodies is disclosed. The kit comprises as active constituents a container containing lymphokines and a container containing lysosomotropic agents.

Method of producing human monoclonal antibodies and kit therefor

Growing community of inventors

Hjarup, Sweden

Carl A Borrebaeck