Escherichia coli (E. coli) is a facultative anaerobic bacterium, easily cultured in labs, making it a key model organism in genetics, microbiology, and biotechnology. It is commonly used for large-scale production of therapeutic proteins, with 30% of approved therapeutic proteins produced using E. coli. Beckman Coulter Life Sciences demonstrates the use of the BioLector microbioreactor and the Multisizer 4e Coulter Counter to optimize E. coli culture conditions and characterize cell gro