palpha 2-Macroglobulin receptor was extracted from human diploid fibroblasts and purified by affinity chromatography in a single step. The receptor had mol.wt. 125 000 after sodium dodecyl sulphate (SDS)/polyacrylamide-gel electrophoresis. The isolated receptor was separated by SDS/polyacrylamide-gel electrophoresis, transferred on to nitrocellulose sheets and subsequently renatured, as shown by a specific binding test, by incubation with Nonidet P40./p
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