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Journal of Lipid Research, Vol 28, 1233-1239, Copyright © 1987 by Lipid Research, Inc.

ARTICLES

Single spin density gradient ultracentrifugation method for the detection and isolation of light and heavy low density lipoprotein subfractions

DW Swinkels, HL Hak-Lemmers and PN Demacker
Department of Medicine, Sint Radboud Hospital, University of Nijmegen, The Netherlands.

A single spin density gradient ultracentrifugation method in a swinging bucket rotor has been applied for the detection and isolation of low density lipoprotein (LDL) subfractions. The visualization of the LDL heterogeneity was facilitated by prestaining the serum with Coomassie Brilliant Blue R prior to density gradient ultracentrifugation for 19.5 hr. A total of 13 human serum pools was analyzed. In each pool, two LDL subfractions, a lighter LDL1 subfraction, occasionally showing a subdivision into two bands, LDL1A and LDL1B, and a heavier LDL2 could be clearly distinguished by the banding pattern in the density gradient. Physicochemical characteristics of the isolated LDL subfractions were determined. The simple method for detection and isolation of these subfractions presented here may facilitate future studies on LDL heterogeneity.
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