Protein Modification Reagents
TCEP
Economically equivalent, odor free reductions at
DTT
prices . Available in large quantities with very high
purity and stability. In addition, Soltec Ventures offers a
TCEP
stable solution. The solution is 0.5M and stable at room temperature under inert atmosphere.
M115 Tris(2-carboxyethyl)phosphine
hydrochloride, TCEP
f.w.: 286.6daltons [ 51805-45-9 ]
Stability!
- Odorless and non-volatile
- Solid is stable in air for several months
- Dilute TCEP solutions in air show no appreciable oxidation
up to at least 72 hours pH<7.66
Solubility!
310g/l in water
Reactivity!
- TCEP reduces organic disulfides to thiols rapidly and
quantitatively in water
- More complete reductions than
1,4-dithiothreitol (
DTT
), Cleland's reagent
- Even very stable alkyl disulfides are completely reduced at
room temperature and pH 5 in less than 5 min.
- Dilute (1mM) TCEP solutions react rapidly at room
temperature
- The strength of the phosphorus-oxygen bond makes the
reaction irreversible
- Kinetics rather than thermodynamics controls the reduction
Selectivity!
- TCEP is selective for disulfides
- TCEP does not react with other functional groups on proteins
- Unreactive towards many common alkylating reagents so
reductions have been carried out simultaneously with alkylations
TCEP References:
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