Ucbbiopharma Srl

Ucb Biopharma Sprl

Ucb Pharma, S.a.

Gavin Barry Wild

Sam Philip Heywood

Razwan Hanif

Christopher John Le Page

The present invention provides method for increasing the percentage of monomer in a composition of recombinantly expressed antibody molecules characterised in that the antibody molecule comprises at least one Fv with specificity for an antigen of interest comprising one VH and one VL wherein said VH and VL are connected directly or indirectly via one or more linkers and are stabilised by a disulfide bond therebetween, said method comprises a) a thermal conversion step of holding the composition comprising the antibody molecule at a temperature in the range 30 to 60&#xb0; C. for a period of at least 1 hour, wherein step a) is performed in the presence of a reducing agent or after treatment with a reducing agent.

Method for increasing the percentage of monomeric antibody Fab-dsFv multimeric species

The present invention provides method of increasing the percentage of monomer in a composition of recombinantly expressed antibody molecules characterised in that the antibody molecule comprises at least one Fv with specificity for an antigen of interest comprising one VH and one VL wherein said VH and VL are connected directly or indirectly via one or more linkers and are stabilised by a disulfide bond therebetween, said method comprises: a) a conversion step of treating the composition with a denaturant selected from urea and/or Guanidine hydrochloride; b) wherein step a) is performed in the presence of a reducing agent or after treatment with a reducing agent.

Method of monomerisation of recombinant antibody molecules

The present invention provides a method for recovering a human VH3 domain-containing antibody in monomeric form. In particular the present invention provides a new method that allows recovery of monomeric human VH3 domain-containing antibodies from a mixture containing monomeric and multimeric forms of the antibody.

Method for protein purification

The present invention provides method for purifying a recombinant protein from a gram-negative bacterial host cell sample or extract thereof wherein said host cell expresses a recombinant protein and a recombinant disulphide isomerase DsbC; comprising: a. adjusting the pH of the host cell sample or extract thereof to a pH of 5 or less to precipitate the recombinant disulphide isomerase; and b. separating precipitated recombinant disulphide isomerase DsbC from the recombinant protein to produce a recombinant protein sample.

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Slough, United Kingdom

Gavin Barry Wild