title: Periodic changes of beta-galactosidase in Escherichia coli B in the chemostat.
mesh_terms: D003470:Culture Media; D004926:Escherichia coli / Q000201:enzymology*; D005690:Galactose; D005696:Galactosidases / Q000032:analysis*; D007785:Lactose
chemical_list: D003470:Culture Media; D005696:Galactosidases; D007785:Lactose; D005690:Galactose