Improved fermentation processes for NS0 cell lines expressing human antibodies and glutamine synthetase.

To meet the increasing requirement for therapeutic antibodies to conduct clinical trials, an enhanced culture medium and fed-batch process was developed for GS-NS0 cell lines. This process was shown to produce high concentrations of monoclonal antibodies for several cell lines expressing different antibodies. Cells were adapted to growth in a glutamine- and serum-free medium containing bovine serum albumin (BSA), cholesterol, and transferrin.

Structure of a Cys25-->Ser mutant of human cathepsin S.

Cathepsin S (EC 3.4.22.