Table 2 Summary of bacterial growth parameters and magnetosome properties obtained after 140 h of cultivation, corresponding to ~ 5 bacterial generation, in a 7.5 L bioreactor fed-batch culture of MSR1 bacteria derived from unfrozen CCB, unfrozen PCB and 16-month stored PCB to evaluate PCB stability after long-term storage and compare production performance with CCB, i.e. optical density of bacterial suspension measured at 565 nm (OD₅₆₅), biomass (g), generation time (h), total intracellular iron in mg of intracellular iron per liter of growth medium, quantity of internalized iron inside cells in mg per gram of dried cell weight, volume of feed medium injected during culture, mass of dried magnetosomes purified, yield of magnetosome production in mg of dried magnetosomes purified per liter of growth medium, total intracellular iron in the form of magnetosome in percentage and number of magnetosomes per bacterium, magnetosome size (nm)

From: Set-up of a pharmaceutical cell bank of Magnetospirillum gryphiswaldense MSR1 magnetotactic bacteria producing highly pure magnetosomes