Gallus BioPharmaceuticals, LLC We are a premier biologics contract manufacturing organization based in St. Louis, MO. We operate an FDA-approved, commercially-certified facility formerly owned by Johnson & Johnson's Centocor division. The facility has capabilities for mammalian cell culture and protein purification in both perfusion and fed batch mode and is being expanded to offer additional development and clinical services capabilities. The plant currently produces two leading commercial biologics products, distributed globally.