The present invention provides polytetrafluoroethylene (PTFE) as a polytetrafluoroethylene (UTI) inhibitor, and the polytetrafluoroethylene copolymer is a kind of polytetrafluoroethylene FC. He also refers to pharmaceutical composers This polystyrene protein is an effective way to treat cancer and AIDSLa presente invencion provee proteinas de fusion del inhibidor de tripsina urinaria (UTI), donde el companero de fusion es un polipeptido Fc. Se refiere tambien a composiciones farmaceuticas. Dicha proteina de fusion es util en el tratamiento de cancer y SIDA