Provided herein is are methods of preventing loss of copper in a solution. The solution is a cell culture medium, cell culture feed or cell culture additive comprising copper (II) and cysteine. The method comprises having substantially the same amount of soluble copper before and after filtering the solution. Also provided are methods of preparing a cell culture medium, cell culture feed or cell culture additive comprising copper (II), cysteine, and other components, without loss of soluble copper. Also provided are methods of culturing a cell or making a biological product comprising use of media prepared according to said methods of preventing loss of copper or preparing said media. Further provided is media prepared according to said methods and use of such media.
[EN] METHOD FOR PRODUCING REDUCED GLUTATHIONE<br/>[FR] PROCÉDÉ DE PRODUCTION DE GLUTATHION RÉDUIT<br/>[JA] 還元型グルタチオンの製造方法
[EN] METHOD FOR MEDIUM TREATMENT BEFORE INOCULATION<br/>[FR] PROCÉDÉ DE TRAITEMENT DE MILIEU AVANT INOCULATION
申请人:GENENTECH INC
公开号:WO2021209512A1
公开(公告)日:2021-10-21
The disclosure relates to methods for handling and supplementation of cell culture medium to improve process performance in eukaryotic recombinant expression systems.