Description_x000D_ General description_x000D_ Penicillin, a β-lactam antibiotic is extremely active towards bacteria. Penicillins are also termed as penams. It is naturally occurring and has a bicyclic skeleton. Streptomycin is a pseudotrisaccharide. It comprises of a monosubstituted aminocyclitol._x000D_ Application_x000D_ Penicillin-Streptomycin has been used:_x000D_ • as a supplement in Dulbecco′s modified Eagle′s medium (DMEM) to maintain the Huh7 liver hepatoma cell line_x000D_ • as a supplement in Roswell park memorial institute-1640 (RPMI) medium to maintain mouse lymphoma YAC-1 cells_x000D_ • as a component in minimum essential medium Eagle to treat individual mouse spleens for the preparation of splenocytes_x000D_ • as a supplement in FMX-8 complete medium to culture Chinese hamster ovary cells_x000D_ Biochem/physiol Actions_x000D_ Penicillins can prevent the synthesis of bacterial cell wall. This antibiotic can be used in the treatment of skin and urinary tract infections, upper and lower respiratory infections, and endocarditis. Streptomycin can block Mycobacterium tuberculosis in vitro. Streptomycin inhibits prokaryote protein synthesis by preventing the transition from initiation complex to chain-elongating ribosome, causing miscoding._x000D_ Components_x000D_ This product is formulated to contain 5,000 units penicillin and 5 mg streptomycin/mL solubilized in a proprietary citrate buffer._x000D_ Other Notes_x000D_ 20ml,100ml_x000D_ Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage.