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TMPD dihydrochloride

Cat. No. M19864

All AbMole products are for research use only, cannot be used for human consumption.

TMPD dihydrochloride Structure
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100mg USD 50  USD50 In stock
500mg USD 80  USD80 In stock
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Biological Activity

TMPD dihydrochloride is a membrane tethering compound used to study cytochrome C for its effect on yeast cell death. TMPD dihydrochloride is also a substrate for COMPLEX IV. TMPD (N,N,N′,N′-tetramethyl-para-phenylene-diamine) is used in cell culture and microbiology to differentiate organisms that exhibit cytochrome c oxidase activity and to distinguish between Gram-negative and Gram-positive pathogenic and non-pathogenic bacteria. The concept of TMPD oxidation by microorganisms is widely used and is known as a successful colorimetric indicator for bacterial oxidases, as the radical cation TMPD+˙, formed by oxidation, shows a characteristic deep blue colour. The use of N,N,N cent,N cent-tetramethyl-p-phenylenediamine (TMPD) in high throughput microplate assays of COX activity could become the approach of choice in the screening of potential therapeutics that inhibit COX activity in vivo.

Protocol (for reference only)
Cell Experiment
Cell lines Escherichia coli & Bacillus subtilis
Preparation method Bacteria culture and oxidase test
Escherichia coli Bacteria were cultured in 2 × TY liquid microbial growth medium (broth), containing 16 g/L tryptone, 10 g/L yeast extract and 5.0 g/L NaCl. Growth medium was inoculated with bacteria from frozen stocks and incubated in glass culture flasks for 18 h at 37 °C in an incubator shaker. An E. coli suspension of 50 μL was transferred into a new culture flask, containing fresh growth medium. Following incubation for 3 to 4 h at 37 °C, the number of bacteria in solution was determined by optical density (OD) at a wavelength of 600 nm (OD600 of 1.0 = 8 × 108 cells/mL). When an OD600 between 0.4 and 1.8 was reached, bacteria were harvested by centrifugation for 15 min at 3000 rcf and re-suspended in pre-warmed (37 °C) PBS.
Bacillus subtilis (strain PY79) Low salt growth medium (broth), containing 10 g/L tryptone, 5.0 g/L yeast extract and 5.0 g/L sodium chloride, was inoculated with cultures from frozen stocks and incubated at 30 °C for 36 h in an incubator shaker. An OD600 was determined to calculate number of bacteria in solution (OD600 of 1.0 = 5 × 108 cells/mL). Bacteria were harvested by centrifugation for 10 min at 300 rcf and re-suspended in pre-warmed (30 °C) PBS. Cultures grown on agar, containing 10 g/L tryptone, 5.0 g/L yeast extract 5.0 g/L sodium chloride and 20 g/L agar, were inoculated onto agar plates and grown at 30 °C for 36 h in a static incubator.
For the oxidase test, 200 μL of a 1% (wt) N,N,N′,N′-tetramethyl-p-phenylenediamine dihydrochloride (TMPD-2HCl) solution was added to 1 mL of cell suspension (1 × 107 cells/μL). Images were taken within 30 s of solution mixture.
Concentrations 200 μL of a 1% (wt) N,N,N′,N′-tetramethyl-p-phenylenediamine dihydrochloride (TMPD-2HCl) solution
Incubation time -
Animal Experiment
Animal models
Formulation
Dosages
Administration
Chemical Information
Molecular Weight 237.17
Formula C10H18Cl2N2
CAS Number 637-01-4
Solubility (25°C) Water ≥ 60 mg/mL
DMSO ≥ 10 mg/mL
Storage 4°C, protect from light, dry, sealed
References

[1] S Kuss, et al. Chem Sci. Electrochemical recognition and quantification of cytochrome c expression in Bacillus subtilis and aerobe/anaerobe Escherichia coli using N, N, N', N'-tetramethyl- para-phenylene-diamine (TMPD)

[2] Nenad Petrovic, et al. Methods Mol Biol. Using N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) to assay cyclooxygenase activity in vitro

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