| abstract |
Provided herein are methods for monitoring production of a multispecific binding protein and one or more mispaired species by a cell line, as well as methods of production and screening related thereto. In some embodiments, the methods comprise detecting an amount ( e.g ., a relative amount) of a multispecific binding protein and one or more mispaired species in a cell culture medium by size-exclusion ultra-performance liquid chromatography and mass spectrometry (SE-UPLC-MS). In some embodiments, the multispecific binding protein is a multispecific antibody, antibody fragment, or Fc fusion protein. |