Antibiotics
Media used for the production of chlorotetracyclin consists of

sugar, CaCO3 and (NH4)2SO4
corn steep liquor, CaCO3 and (NH4)2SO4
sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl

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