G418-RO

G-418 Solution

solution, =98% (TLC), suitable for transfection

• Synonym(s): G 418 disulfate salt solution, O-2-Amino-2,7-dideoxy-Δ-glycero-α-Δ-glucoheptopyranosyl[1->4]-O-3-deoxy-4C-methyl-3-[methyl-amino]-β-L-arabinopyranosyl-Δ-streptamine, disulfate salt, neomycin, Antibiotic G418
• Empirical Formula (Hill Notation): C₂₀H₄₀N₄O₁₀ · 2H₂SO₄
• CAS Number: 108321-42-2
• Molecular Weight: 692.71
• MDL number: MFCD00058314
• UNSPSC Code: 12352200
• PubChem Substance ID: 329799925
• NACRES: NA.28

Properties

• assay: 98% (TLC)
• form: solution
• mol wt: 692.7 Da
• packaging: pkg of 100 ml (04727894001 [5 x 20 ml, equivalent to 5 g]), pkg of 20 mL (04727878001 [equivalent to 1 g])
• manufacturer/tradename: Roche
• concentration: 50 mg/mL
• technique(s): transfection: suitable
• antibiotic activity spectrum: protozoa
• mode of action: protein synthesis | inhibits
• storage temp.: 2-8°C
• SMILES string: OS(O)(=O)=O.OS(O)(=O)=O.CN[C@H]1[C@H](O)[C@@H](OC[C@@]1(C)O)O[C@H]2[C@H](N)C[C@H](N)[C@@H](O[C@H]3O[C@H]([C@H](C)O)[C@@H](O)[C@H](O)[C@H]3N)[C@@H]2O
• InChI: 1S/C20H40N4O10.2H2O4S/c1-6(25)14-11(27)10(26)9(23)18(32-14)33-15-7(21)4-8(22)16(12(15)28)34-19-13(29)17(24-3)20(2,30)5-31-19;2*1-5(2,3)4/h6-19,24-30H,4-5,21-23H2,1-3H3;2*(H2,1,2,3,4)/t6?,7-,8+,9+,10+,11-,12-,13-,14+,15+,16-,17-,18+,19-,20+;;/m0../s1
• InChI key: UHEPSJJJMTWUCP-NKCAIAFTSA-N

Description

General description

O-2-Amino-2,7-dideoxy-δ-glycero-α-δ-glucoheptopyranosyl[1->4]-O-3-deoxy-4C-methyl-3-[methyl-amino]-β-L-arabinopyranosyl-δ-streptamine, disulfate salt G-418, an aminoglycoside antibiotic, is used as a dominant selection agent in transfection experiments. The antibiotic interferes with the function of 80S ribosomes and blocks protein synthesis in eukaryotic cells. Transfection of neomycin-resistance genes into cells results in resistance to G-418 and enables the cells to grow in culture media containing G-418.

Application

G-418 Solution is used to select eukaryotic cells that are stably transfected with the neomycin resistance gene (neo), and to maintain the phenotype (neo^r) of resistant cells.
G-418 is also used to eliminate contaminating fibroblasts from mixed cultures.

Biochem/physiol Actions

Mode of Action: G418 blocks polypeptide synthesis and protein elongation by inhibiting synthesis at the 70S and 80S ribosomes.

Antimicrobial Spectrum: G418 selects for cells stably transfected with an iNOS promoter construct and neomycin resistance gene and shows activity against protozoa and helminthes.

Features and Benefits

• Convenient sterile-filtered solution for immediate use – saves valuable time and effort, and avoids potential errors arising from the preparation of sterile working stock solution from G-418 powder.
• Consistent quality and potency – shows no lot-to-lot variation in its ability to select resistant cells.
• Function tested in a cell culture assay - ensures effectiveness.
• Very pure, as indicated by TLC and microbiological assays – allows you to use less antibiotic while producing greater selection pressure. Lack of contaminants means minimal toxicity.
• Cost effective, since the selected colonies are stable.

Contents
Aqueous solution of G-418, 892 μg/mg, filtered through 0.2μm pore size membrane

Preparation Note

Working concentration: The optimal concentration of G-418 must be determined experimentally and varies with the cell type used.
Active weight: >700μg/mg
Recommended concentration in cell culture: The optimal concentration of G-418 must be determined experimentally; it varies from 100μg/ml to 1mg/ml, depending on the cell type used.
Specific rotation: 104° to 121°, in water (on dry basis, according to USP XXII).

Analysis Note

Purity: = 98%, as shown by TLC.
Function testing: in cell culture.

Other Notes

For life science research only. Not for use in diagnostic procedures.

Safety Information

• pictograms: GHS08
• signalword: Danger
• pcodes: P261 - P280 - P284 - P304 + P340 - P333 + P313 - P342 + P311
• Hazard Classifications: Resp. Sens. 1 - Skin Sens. 1
• Storage Class: 12 - Non Combustible Liquids
• wgk: WGK 1
• flash_point_f: No data available
• flash_point_c: No data available
• hcodes: H317,H334