Haunerland NH, Ryan RO, Law JH, Bowers WS. Purification of very high density lipoproteins by differential density gradient ultracentrifugation.
Anal Biochem 1987;
161:307-10. [PMID:
3578796 DOI:
10.1016/0003-2697(87)90455-6]
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Abstract
Differential density gradient ultracentrifugation procedures, utilizing a vertical rotor, were developed for the preparative purification of very high density lipoproteins (VHDL, density greater than 1.21 g/ml). The VHDLs of several insect species were purified as follows. An initial density gradient ultracentrifugation step removed lipoproteins of lower density from the VHDL-fraction, which partially separated from the nonlipoproteins present in the infranatant. A complete separation was achieved by a second centrifugation step employing a modified gradient system. The use of a vertical rotor and specially designed discontinuous gradients allows a relatively fast, efficient, and economical isolation of the class of very high density lipoproteins. Similar gradient systems should be useful for the detection and purification of VHDLs from other sources.
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