Studies on the Dissociation of Porcine Haptoglobin

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Abstract
Porcine haptoglobin was tested for reversible dissociation in dilute solution by gel filtration. Elution volume in Bio-Gel P-150 was independent of concentration and shapes of elution profiles failed to show dissociation. Molecular weight in dilute solution was estimated as 96 500. Interchain disulfide bridges were assayed by polyacrylamide gel electrophoresis in sodium dodecyl sulfate. Partially reduced samples showed a series of intermediates but fully reduced samples showed only heavy and light chains. Intermediates were tentatively identified as to chain composition from their electrophoretic mobilities.

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