High-Density Lipoprotein as Carrier for Amyloid-related Protein SAA in Rabbit Serum

Abstract
Evidence is presented that SAA is complexed to high density lipoprotein (HDL) in rabbit serum and is co-isolated with HDL apoproteins. The binding of SAA to HDL seems to be quite strong, judged from affinity chromatography experiments. The studies did not reveal any interaction between SAA and albumin, and there was no evidence that SAA could complex to itself. By isolation of HDL apoproteins, SAA seems to behave like other known apoproteins and may be characterized as an apoprotein that is present in normal serum in very low concentration but increases in concentration under different unphysiological circumstances.

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