Before revision: In the early days of the biotechnology industry, most biopharmaceutical products were made in E. coli; by 2004 more biopharmaceuticals were manufactured in eukaryotic cells, like CHO cells, than in microbes, but used similar bioreactor systems.
After revision: In the early days of the biotechnology industry, most biopharmaceutical products were made in E. coli; by 2004 more biopharmaceuticals were manufactured in eukaryotic cells, such as CHO cells, than in microbes, but used similar bioreactor systems.