Diethylaminoethyl cellulose (DEAE-C) is a positively charged resin used in ion-exchange chromatography, a type of column chromatography, for the separation and purification of proteins and nucleic acids. Gel matrix beads are derivatized with diethylaminoethanol (DEAE) and lock negatively charged proteins or nucleic acids into the matrix. The proteins are released from the resin by increasing the salt concentration of the solvent or changing the pH of the solution as to change the charge on the protein.
Schematic structure of DEAE-C: positively charged diethylaminoethanol groups can bind negative ions
DEAE-C is synthesized by an alkali-catalyzed reaction of cellulose (obtained from cotton fabric) with 2-chlorotriethylamine, illustrated as following :[1]
Typesedit
Common resinsedit
DEAE-C is commonly commercially available as DE52 and DE53.[2] These resins are prepared preswollen[3] although cellulose exchangers swell in a strong basic environment to increase access to binding sites.[4]
DE52 has a pKa of 11.5.[citation needed] The buffering range for diethanolamine is 8.4-8.8, though the range for DEAE-C varies between manufacturers.[5]
DEAE-Dedit
DEAE-Dextran (DEAE-D) is a positively charged dextran derivative that can be used for vaccine production, gene therapy, protein stabilization, dyslipidemia prevention, flocculating agents, and many other applications.[6] DEAE-D is also used for transfecting animal cells with foreign DNA. It is added to solution containing DNA meant for transfection. It binds and interacts with negatively charged DNA molecules and via an unknown mechanism brings about the uptake of nucleic acids by the cell. This procedure is highly suited for transient transfection used for various molecular biology studies.[7]
DEAE-C is a weak anion exchanger. This exchange is utilized to separate proteins that have faintly differing charges. Like all anion exchangers, the resin carries a positive charge that interacts favorably with negative charges. The positive charge of DEAE cellulose is due to a protonated amine group. To ensure that the resin is protonated and positively charged, the chromatography should be performed at least 2 pH units below the pKa of the amine group, 10. The strength of the bond between the resin and protein is highly dependent on the pH range in the column and the pI of the protein of interest. The resin is a weak exchanger because it is only partially ionized over most pH values, and an efficient separation with DEAE-C chromatography requires a specific, narrow pH range.[8]
Cellulose, dextran, agarose, and other insoluble complexes are unaffected because they compose inert matrices, hence why they are so often derivatized with strong and weak cation and anion exchangers in chromatography. DEAE-C beads have diethylaminoethyl chains covalently bound to oxygen atoms on the D-glucose subunits of cellulose.
^Rousseau, Ronald W.; Ferrell, James K.; Reardon, Robert F. (1984-06-01). "Synthesis of diethylaminoethyl cellulose on cotton fabric". Industrial & Engineering Chemistry Product Research and Development. 23 (2): 250–252. doi:10.1021/i300014a015. ISSN 0196-4321.
^"Whatman® anion exchange cellulose DE52". Sigma-Aldrich. Retrieved 11 May 2016.
^Reuveny, S.; Silberstein, L.; Shahar, A.; Freeman, E.; Mizrahi, A. (Feb 1982). "DE-52 and DE-53 Cellulose Microcarriers: I. Growth of Primary and Established Anchorage-Dependent Cells". In Vitro. 18 (2): 92–98. JSTOR 20170418.
^Peterson, Elbert A.; Sober, Herbert A. (1956). "Chromatography of Proteins. I. Cellulose Ion-exchange Adsorbents". Journal of the American Chemical Society. 78 (4): 751–755. doi:10.1021/ja01585a016. ISSN 0002-7863.
^"DEAE and CM Bio-Gel ® A Ion Exchange Gels Instruction Manual" (PDF). Bio-Rad. Retrieved 11 May 2016.
^(PDF). GE Life Sciences. Amersham Biosciences. Archived from the original (PDF) on 11 June 2016. Retrieved 11 May 2016.
^Gulick, Tod (2003). "Transfection Using DEAE-Dextran". Current Protocols in Cell Biology. 19: 20.4.1–20.4.10. doi:10.1002/0471143030.cb2004s19. PMID 18228428.
^Ninfa, Alexander (2010). Fundamental laboratory approaches for biochemistry and biotechnology. Hoboken, NJ: John Wiley. ISBN978-0-470-08766-4.
December 20, 2023
diethylaminoethyl, cellulose, deae, positively, charged, resin, used, exchange, chromatography, type, column, chromatography, separation, purification, proteins, nucleic, acids, matrix, beads, derivatized, with, diethylaminoethanol, deae, lock, negatively, cha. Diethylaminoethyl cellulose DEAE C is a positively charged resin used in ion exchange chromatography a type of column chromatography for the separation and purification of proteins and nucleic acids Gel matrix beads are derivatized with diethylaminoethanol DEAE and lock negatively charged proteins or nucleic acids into the matrix The proteins are released from the resin by increasing the salt concentration of the solvent or changing the pH of the solution as to change the charge on the protein Schematic structure of DEAE C positively charged diethylaminoethanol groups can bind negative ions Contents 1 Preparation 2 Types 2 1 Common resins 2 2 DEAE D 2 3 Other derivatives 3 Ion exchange chromatography 4 See also 5 ReferencesPreparation editDEAE C is synthesized by an alkali catalyzed reaction of cellulose obtained from cotton fabric with 2 chlorotriethylamine illustrated as following 1 nbsp Types editCommon resins edit DEAE C is commonly commercially available as DE52 and DE53 2 These resins are prepared preswollen 3 although cellulose exchangers swell in a strong basic environment to increase access to binding sites 4 DE52 has a pKa of 11 5 citation needed The buffering range for diethanolamine is 8 4 8 8 though the range for DEAE C varies between manufacturers 5 DEAE D edit DEAE Dextran DEAE D is a positively charged dextran derivative that can be used for vaccine production gene therapy protein stabilization dyslipidemia prevention flocculating agents and many other applications 6 DEAE D is also used for transfecting animal cells with foreign DNA It is added to solution containing DNA meant for transfection It binds and interacts with negatively charged DNA molecules and via an unknown mechanism brings about the uptake of nucleic acids by the cell This procedure is highly suited for transient transfection used for various molecular biology studies 7 Other derivatives edit DEAE Sepharose DEAE 650 and DEAE Sephadex are commonly used in chromatography Ion exchange chromatography editDEAE C is a weak anion exchanger This exchange is utilized to separate proteins that have faintly differing charges Like all anion exchangers the resin carries a positive charge that interacts favorably with negative charges The positive charge of DEAE cellulose is due to a protonated amine group To ensure that the resin is protonated and positively charged the chromatography should be performed at least 2 pH units below the pKa of the amine group 10 The strength of the bond between the resin and protein is highly dependent on the pH range in the column and the pI of the protein of interest The resin is a weak exchanger because it is only partially ionized over most pH values and an efficient separation with DEAE C chromatography requires a specific narrow pH range 8 Cellulose dextran agarose and other insoluble complexes are unaffected because they compose inert matrices hence why they are so often derivatized with strong and weak cation and anion exchangers in chromatography DEAE C beads have diethylaminoethyl chains covalently bound to oxygen atoms on the D glucose subunits of cellulose See also editSize exclusion chromatography Stationary phaseReferences edit Rousseau Ronald W Ferrell James K Reardon Robert F 1984 06 01 Synthesis of diethylaminoethyl cellulose on cotton fabric Industrial amp Engineering Chemistry Product Research and Development 23 2 250 252 doi 10 1021 i300014a015 ISSN 0196 4321 Whatman anion exchange cellulose DE52 Sigma Aldrich Retrieved 11 May 2016 Reuveny S Silberstein L Shahar A Freeman E Mizrahi A Feb 1982 DE 52 and DE 53 Cellulose Microcarriers I Growth of Primary and Established Anchorage Dependent Cells In Vitro 18 2 92 98 JSTOR 20170418 Peterson Elbert A Sober Herbert A 1956 Chromatography of Proteins I Cellulose Ion exchange Adsorbents Journal of the American Chemical Society 78 4 751 755 doi 10 1021 ja01585a016 ISSN 0002 7863 DEAE and CM Bio Gel A Ion Exchange Gels Instruction Manual PDF Bio Rad Retrieved 11 May 2016 DEAE Dextran PDF GE Life Sciences Amersham Biosciences Archived from the original PDF on 11 June 2016 Retrieved 11 May 2016 Gulick Tod 2003 Transfection Using DEAE Dextran Current Protocols in Cell Biology 19 20 4 1 20 4 10 doi 10 1002 0471143030 cb2004s19 PMID 18228428 Ninfa Alexander 2010 Fundamental laboratory approaches for biochemistry and biotechnology Hoboken NJ John Wiley ISBN 978 0 470 08766 4 Retrieved from https en wikipedia org w index php title Diethylaminoethyl cellulose amp oldid 1047982780, wikipedia, wiki, book, books, library,
