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Using the ExpiCHO and Expi293 expression systems, cells were transfected with Positive Control Rabbit IgG plasmid that was purified using the PureLink Expi Endotoxin-Free Megaprep Plasmid Purification Kit or Qiagen's EndoFree Mega Kit. For the ExpiCHO system, antibody titer was measured using the Maxi Titer Protocol.
