Abstract: Provided herein are methods of separating host cell lipases from a production protein in chromatographic processes and methods of improving polysorbate-80 stability in a production protein formulation by separating host cell lipases from the production protein using chromatographic processes. Also provided herein are compositions comprising antibodies or antigen binding fragments thereof that bind to cytotoxic T lymphocyte associated antigen 4 (CTLA4). In another aspect, such compositions further comprise a reduced level of host cell proteins and/or increased level of polysorbate-80 (PS-80) stability.

Abstract: Provided herein are methods of separating host cell lipases from an anti-LAG3 antibody or antigen binding fragment in chromatographic processes and methods of improving polysorbate-80 stability in an anti-LAG3 antibody formulation by separating host cell lipases from the anti-LAG3 antibody or antigen binding fragment using chromatographic processes. Also provided are pharmaceutical compositions comprising an anti-LAG3 antibody or antigen binding fragment and less than 2 ppm of a host cell lipase.

Abstract: Provided herein are methods of separating host cell lipases from a production protein in chromatographic processes and methods of improving polysorbate-80 stability in a production protein formulation by separating host cell lipases from the production protein using chromatographic processes. Also provided are pharmaceutical compositions comprising less than 1 ppm of a host cell lipase.