Buffers maintain their pH when small amounts of strong acids or bases are added. In biology, buffer solutions are used to provide a constant pH environment for biochemical processes. The pH often changes the environments of tissues and cells and can alter the activity of biomolecules. Buffers maintain the correct pH for proteins and oligonucleotides, and are especially important for techniques like electrophoresis.
Commonly used buffers in life science research share some of these characteristics:
- A pKa value between 6.0 and 8.0
- High water solubility
- Minimal changes due to temperature and concentration
- Limited effects due to ionic or salt composition of the solution
Browse our comprehensive selection of buffers including common buffers tris(hydroxymethyl)aminomethane (tris) and 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES).
Deionized Formamide is used in molecular biology and a denaturing agent for nucleic acids in gel electrophoresis orr hybridization experiments. In the latter case the role of formamide is to decrease the temperature necessary for the reassociation of complementary nucleic acids.
SDS EASY SOL 20% (fr)
SDS is an anionic detergent typically used to solubilize and denature proteins for electrophoresis. Most proteins bind SDS in a ratio of 1.4 grams SDS to 1 gram protein. The charges intrinsic to the protein become insignificant compared to the overall negative charge provided by the bound SDS.It is RNAse,DNAse, Protease free with an assay value of 20%.This solution is provided as a convenient ready-to-use firmat which eliminates the need to handle powdered SDS.
CHAPSO is the hydroxy analog of CHAPS; a nondenaturing zwitterionic detergent for solubilizing proteins, especially integral membrane proteins while maintaining the functional capability of the protein of interest. It has a more polar head group than CHAPS, giving it a greater solubility. CHAPSO has a high CMC (8 mM) and does not denature membrane-bound proteins. It can solubilize the opiate receptor in a state exhibiting reversible binding of opiates.
Potassium Phosphate, Monobasic
Potassium phosphate is a reagent with high buffering capacity. It occurs in several forms: monobasic, dibasic, and tribasic (K3PO4). Most pH neutral potassium phosphate buffer solutions consist of mixtures of the monobasic and dibasic forms to varying degrees, depending on the desired pH.
Potassium Phosphate Dibasic
Potassium phosphate is a reagent with high buffering capacity. It occurs in several forms: monobasic, dibasic and tribasic. Most pH neutral potassium phosphate buffer solutions consist of mixtures of the monobasic and dibasic forms to varying degrees, depending on the desired pH.
Choline chloride is an organic compound and a quaternary ammonium salt. It is a weak acid. Choline chloride is the salt of the naturally occurring choline, the pre-stage of the neurotransmitter acetylcholine, which is important for mnemonic and thought-processes. Choline occurs naturally in fungi, hop and kingcups and as integral part of lecithin. Choline chloride is a common food additive in animal husbandry
Guanidine hydrochloride consists of a networkof guanidinium cations and chloride anions linked by N–H•••Cl hydrogen bonds,it is a strong chaotropic agent. Guanidine HCl may agglomerate upon storage. It may appear as a free-flowing crystalline powder, a free flowing powder with solid material dispersed throughout, or a solid. The quality of the product does not appear to be affected and solutions prepared from the free-flowing and lumpy guanidine HCl appear identical.
DEPC Trested Water is designed for applications where DNase and RNase contamination are of concern. While auotclaving alone can sufficiently inactivate RNases for many applications, water that is treated with diethylpyrocarbonate (DEPC) is often prefferable as added precaution. This product is deionized water that has been DEPC treated, then filtered and autoclaved to provide a ready-to-use reagent that can be used with confidence.
TBE 10X BUFFER (1L) (fr)
TBE buffer maintains the structural integrity of nucleic acids and more suitable for their size analysis. TBE has a greater buffering capacity and will give sharper resolution. TBE is better suited for high-voltage (>150 V) electrophoresis because of its higher buffering capacity.