G-418 disulfate (Geneticin sulfate), is an aminoglycoside antibiotic, inhibits protein synthesis in eukaryotes and prokaryotes. G-418 disulfate is commonly used as a selective agent for eukaryotic cells^[1].

G418 sulfate, an aminoglycoside neomycin analogue, interferes with protein synthesis and has been used extensively for selection of mammalian cell lines that possess neomycin resistance (NR). The neomycin resistance (neo) gene is frequently used in eukaryotic vectors as a dominant selectable gene. G418 can be covalently bound to asialoorosomucoid (AsOR) to form a conjugate for hepatocyte-specific targeting and toxicity^[2].
The human GD3 synthase cDNA was transfected into MDA-MB231 cells, and G-418 bulk selection was used to select cells stably overexpressing the GD3 synthase^[2]. An aminoglycoside antibiotic, G418, has been shown to be an inhibitor of many pro- and eukaryotes at concentrations from 1-300 microgram/ml^[4].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (stored under nitrogen, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

• [1]. Giordano-Santini R, et al. An antibiotic selection marker for nematode transgenesis. Nat Methods. 2010;7(9):721-723.  [Content Brief]

  [2]. Volarevic M, et al. A novel G418 conjugate results in targeted selection of genetically protected hepatocytes without bystander toxicity. Bioconjug Chem. 2007;18(6):1965-1971.  [Content Brief]

  [3]. Kwon KM, et al. Disialyl GD2 ganglioside suppresses ICAM-1-mediated invasiveness in human breast cancer MDA-MB231 cells. Int J Biol Sci. 2017;13(3):265-275. Published 2017 Feb 12.  [Content Brief]

  [4]. Davies J, et al. A new selective agent for eukaryotic cloning vectors. Am J Trop Med Hyg. 1980;29(5 Suppl):1089-1092.  [Content Brief]