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Unformatted text preview: DEAE Ion exchange chromatography involves the selective binding of charged proteins to a polymer matrix containing bound charged groups. In anion exchange chromatography, the matrix-bound groups are cation ic ( + charged) and thus selectively bind charged proteins. Small cellulose particles cause low flow rates, because they get stuck in the interstices between the large particles. The more uniform the particle sizes , the higher the flow rate and the better the column functions. Allow particles to settle until next lab period. NOTE: This allows particles to settle into more homogeneous layers (larger at bottom, smaller at top), giving a higher flow rate. The final packed resin should fill ~ column. Assume final column volume (packed resin) = 10mL . Arrange tubing from reservoir so that it dips below the top of the resin in the column and then back up to top. Thus when the reservoir runs dry, flow though the column stops. Whether you have a safety loop in the inlet tubing or not, be sure to clamp off the outlet of the column...
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This note was uploaded on 02/19/2008 for the course BIOBM 4400 taught by Professor Ely,s./nivison,h. during the Spring '06 term at Cornell.
- Spring '06