Abstract
The use of agarose gels as supporting media for flat-bed preparative isoelectric focusing was applied to the fractionation of serum proteins in the pH range 3.5–6, and red cell hemolysates in the pH range 3–8. The agarose gels are easy to prepare, give linear pH gradients, and do not appear to produce molecular sieving effects. Up to 1 g serum proteins can be loaded on the gels, with recoveries between 68 and 82%. Nucleoside phosphorylase from red cell lysates was recovered with 76% yield, indicating that no appreciable denaturation of this enzyme had occurred. Preparative isoelectric focusing in agarose gels provides a useful alternative to existing techniques of preparative isoelectric focusing in sucrose gradients or granulated gels.
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