Preparative polyacrylamide gel electrophoresis has been used in the final stages of purification to prepare horse serum cholinesterase which was at least 9.5% pure, as judged by analytical polyacrylamide gel electrophoresis. The starting material, already purified about 109-fold by the Strelitz method, was purified an additional 89-fold by the procedure. The method involved Sephadex G-ZOO and S...

The possibilities to use capillary zone electrophoresis (CZE) as a preparative tool have been studied, mostly from a theoretical point of view. The preparative performance of CZE is quantitated by the production rate, the amount of analyte that can be purified per unit of time. The production rate available with CZE is shown to depend in the first place on the chemical characteristics of the an...

We have previously shown that plasma lipoproteins can be separated by analytical capillary isotachophoresis (ITP) according to their electrophoretic mobility in a defined buffer system. As in lipoprotein electrophoresis, HDL show the highest mobility followed by VLDL, IDL, and LDL. Chylomicrons migrate according to their net-charge between HDL and VLDL, because ITP has negligible molecular siev...

Preparations of recombinant envelope glycoprotein E2 of hepatitis C virus (r-HCV E2), found to be homogeneous by N-terminal amino acid sequencing and mass spectrometry, resolved into multiple ionic species (isoforms) when analysed by isoelectric focusing (IEF) gel electrophoresis in the p1 range of 3-10. These isoforms possessed pI values in the range of 4.5-8.2. The major isoform with p1 value...

Gel electrophoresis is a widely known group of techniques used to separate and identify macromolecules as DNA, RNA, or proteins based on size, form, or isoelectric point. The separation of molecules by electrophoresis is based on the fact that charged molecules migrate through a gel matrix upon application of an electric field. These techniques have become a main tool in biochemistry, molecular...

Micro-scale isolation of sulfated glycopeptide from tissue was achieved by successive application of pronase digestion (Step 1), cetylpyridinium chloride-fractionation (Step 2), crude heparinase digestion or chondroitinase ABC digestion plus nitrous acid treatment (Step 3) and preparative cellulose acetate membrane-electrophoresis (Step 4). By this method, sulfated glycopeptide was obtained in ...