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A General Method for the Isolation of Haptoglobin 1-1, 2-1, and 2-2 from Human Plasma by Bruce E. Rademacher; William J. Steele is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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A general method for the isolation of haptoglobin 1-1, 2-1, and 2-2 human plasma is described. Plasma is fractionated by affinity chromatography on chicken hemoglobin-Sepharose using the full capacity of the column; then after washing the column thoroughly, haptoglobin is eluted with 8 M urea and the eluate is collected in fractions to separate active and denatured haptoglobin. The urea-free, active fractions of haptoglobin are fractionated by affinity chromatography on Affi-Gel Con A to remove nonglycoproteins, principally apolipoprotein A-I, and the haptoglobin is eluted with 0.5 M glucose. Then the haptoglobin-containing fractions are fractionated by negative immunoadsorption chromatography on anti-chicken hemoglobin-protein A-Sepharose to remove chicken hemoglobin-human haptoglobin complexes. Haptoglobin prepared by this three-step procedure is biologically active and nearly homogeneous. The recovery is approximately 70%, irrespective of phenotype. The procedure can be completed in 3 days. A partial purification of apolipoprotein A-I is obtained simultaneously by this method.

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Author

Bruce E. Rademacher; William J. Steele

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0003-2697)

Published

1986

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)