Abstract
Various ion-exchange resins and zeolite Phillipsite-Gismondine were tested for their potential application as adsorbents for thein situ removal of ammonium ions from animal cell culture media in attempting to increase hybridoma cell density and MAb productivity. A zeolite, Phillipsite-Gismondine demonstrated the best performance in terms of NH4 + adsorption capacity, selectivity and autoclavability among the various adsorbents tested. The biocompatibility of Phillipsite-Gismondine was also tested and the result showed improvement in cell density, viability, and antibody productivity.
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