[Stability without selection pressure of the plasmid pTG 201 during continuous fermentation of Escherichia coli BZ 18 immobilized in a carrageenan gel].

Escherichia coli BZ 18 harboring the plasmid pTG 201 and immobilized in carrageenan gel beads in continuous culture without selection pressure, provides a better stability of the plasmid than free cells, with an approximately equal production of biomass.