*G418 Sulfate Antibiotic Solution, 10 mL

Mirus Bio offers high quality cell culture grade selection antibiotics with the following features:

• Ease of use – Sterile filtered ready-to-use stock solutions for stable cell line generation
• High Purity – Greater than 90% purity determined by HPLC
• High Potency – In combination with high purity ensures better selection at optimal concentrations

Stable cell line generation allows for sustained expression of an exogenous gene which is commonly enriched and maintained through the use of selection antibiotics such as G418, Hygromycin B, Puromycin, etc. Resistance to these antibiotics is conferred through the expression of a positive selection gene: neomycin resistance (neo), hygromycin resistance (hph) and puromycin-N-acetyl-transferase (pac) genes, respectively.

Selection markers can be delivered using the same plasmid (in cis) that contains the gene of interest, or on a separate plasmid (in trans) that needs to be co-transfected with the plasmid containing the gene of interest. 

G418 Sulfate for Stable Cell Line Generation. G418 Sulfate is routinely used for positive selection of cells that express the neo gene encoding neomycin phosphotransferase. This occurs as only cells that have successfully integrated the neo gene can express the positive selection marker. The optimum concentration for selection is cell-type dependent; performing a kill curve is recommended with each new cell type or different antibiotic lot. Recommended concentration for the selection of mammalian cells that are resistant to G418 is 100-2000 µg/ml for mammalian cells.