Thermo Fisher, 15140122, Penicillin-Streptomycin (10,000 U/mL), 100 mL

Penicillin-Streptomycin (10,000 U/mL) is used as an antibiotic supplement for mammalian cell-culture media to reduce the risk of bacterial contamination. The solution contains 10,000 units/mL of penicillin and 10,000 µg/mL of streptomycin in a sterile liquid formulation. Penicillin primarily interferes with bacterial cell-wall synthesis, while streptomycin inhibits bacterial protein synthesis, giving the combination activity against a broad range of Gram-positive and Gram-negative bacteria. This configuration contains 100 mL and is commonly diluted into complete culture medium to obtain routine working concentrations. The product is suitable for research cell-culture workflows that require a standardized antibiotic supplement and can be added during medium preparation without separate weighing or dissolution of individual antibiotics. Its concentrated format is convenient for repeated preparation of cell-culture media across routine maintenance, expansion and assay workflows.