D9779

DL-Dithiothreitol

Molecular Biology, ≥98% (HPLC), ≥99% (titration)

• Synonym(s): (±)-Dithiothreitol, rac-Dithiothreitol, Dithiothreitol, threo-1,4-Dimercapto-2,3-butanediol, Cleland’s reagent, DTT
• Linear Formula: HSCH₂CH(OH)CH(OH)CH₂SH
• CAS Number: 3483-12-3
• Molecular Weight: 154.25
• UNSPSC Code: 12161504
• NACRES: NA.31
• PubChem Substance ID: 24894330
• EC Number: 222-468-7
• Beilstein/REAXYS Number: 1719757
• MDL number: MFCD00004877

Properties

• grade: Molecular Biology
• Quality Level: 200
• assay: ≥98% (HPLC), ≥99% (titration)
• form: powder
• reaction suitability: reagent type: reductant
• mp: 41-44 °C (lit.)
• solubility: H₂O: 50 mg/mL
• cation traces: heavy metals (as Pb): ≤5 ppm
• suitability: suitable for molecular biology
• application(s): advanced drug delivery
• foreign activity: DNase, RNase, protease, none detected
• storage temp.: 2-8°C
• SMILES string: O[C@H](CS)[C@H](O)CS
• InChI: 1S/C4H10O2S2/c5-3(1-7)4(6)2-8/h3-8H,1-2H2/t3-,4-/m1/s1
• InChI key: VHJLVAABSRFDPM-QWWZWVQMSA-N

Description

General description

Dithiothreitol (DTT) is an excellent reagent for maintaining SH groups in a reduced state in proteins. It initiates the thiol-disulfide exchange reaction to completely reduce the intra-or inter-molecular disulfide bonds in biomolecules. DTT specifically targets the disulfide bridge of the cross-linker N,N′-bis(acryloyl)cystamine to break apart the matrix of a polyacrylamide gel and sodium dodecyl polyacrylamide gel electrophoresis (SDS-PAGE). Hence, it is highly effective in use with buffers that quantitatively reduce disulfides. DTT is less pungent and less toxic in nature than 2-mercaptoethanol. It is also 7x more concentrated than beta-mercaptoethanol.

Application

An excellent reagent for maintaining SH groups in reduced state; quantitatively reduces disulfides. DTT is effective in sample buffers for reducing protein disulfide bonds prior to SDS-PAGE. DTT can also be used for reducing the disulfide bridge of the cross-linker N,N′-bis(acryloyl)cystamine to break apart the matrix of a polyacrylamide gel. DTT is less pungent and is less toxic than 2-mercaptoethanol. Typically, a seven fold lower concentration of DTT (100 mM) is needed than is used for 2-mercaptoethanol (5% v/v, 700 mM).

DL-Dithiothreitol is used in protein samples to reduce the disulfide bonds before loading the sample onto the gel for Western Blot or SDS-PAGE[1][2] It has been used in the procedure of in situ hybridization of mRNA.

It has been used:

• as a component for protein extraction in western blot analysis[3]
• to prepare sample lysis buffer for quantitative mass spectroscopy
• as a kinase buffer component for enzyme-linked immunosorbent assay (ELISA)[4]

Biochem/physiol Actions

Dithiothreitol (DTT) is frequently utilized in biochemical preparations of thiol proteins and chemical peptide synthesis. DTT is also used in protein chemistry research on the folding of proteins and enzyme activity.[5]

Features and Benefits

• Suitable for molecular biology
• RNase, DNase, Exonuclease, and Protease-free
• High purity (HPLC ≥98%)
• No heavy metal ≤5ppm

Other Notes

For additional information on our range of Biochemicals, please complete this form.

Safety Information

• pictograms: GHS05,GHS07
• signalword: Danger
• hcodes: H302,H314,H412
• pcodes: P260 - P273 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Skin Corr. 1A
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Faceshields, Gloves
• Storage Class: 8A - Combustible corrosive hazardous materials