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- W2027889716 abstract "Custom-synthesized variants of the commercial Capto S resin were used to examine the effects of resin charge density and dextran content on protein adsorption and intraparticle uptake. For the small protein lysozyme, resin charge density had the greatest effect on equilibrium capacity, consistent with calculations suggesting that lysozyme capacity should be limited by the available charge on the resin. Isocratic retention data and confocal microscopy imaging for this protein revealed a consistent ordering of the resins linking stronger protein–resin interactions with higher static capacities but slower intraparticle uptake rates over the range of properties studied. For the larger protein lactoferrin, it was found that increasing dextran content led to increased protein exclusion from the dextran layer, but that increasing resin charge density helped overcome the exclusion, presumably due to the increased electrostatic attraction between the resin and protein. Collectively examining the lysozyme and lactoferrin data along with information from previous studies suggests that a trade-off in maximizing dynamic capacities should exist between static capacities that increase to a finite extent with increased resin charge density and uptake rates that decrease with increased charge density. Column breakthrough data for lysozyme and lactoferrin appear to support the hypothesis, though it appears that whether a resin charge density is low or high must be considered in relation to the protein charge density. Using these trends, this work could be useful in guiding resin selection or design." @default.
- W2027889716 created "2016-06-24" @default.
- W2027889716 creator A5088129278 @default.
- W2027889716 creator A5089483150 @default.
- W2027889716 date "2011-10-01" @default.
- W2027889716 modified "2023-09-23" @default.
- W2027889716 title "Protein adsorption and transport in dextran-modified ion-exchange media. III. Effects of resin charge density and dextran content on adsorption and intraparticle uptake" @default.
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- W2027889716 doi "https://doi.org/10.1016/j.chroma.2011.08.039" @default.
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