TPST Gene Knock-Out Eliminates Tyrosine Sulfation on a Recombinant Antibody Produced in CHO Cells.
Tyrosine sulfation is a post-translational modification that has been reported to occur infrequently on recombinant monoclonal antibodies (mAbs). We recently demonstrated that tyrosine sulfation occurred on a bispecific antibody (bsAb) produced in Chinese hamster ovary (CHO) cells, using a multi-enzymatic approach in c...