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Human serum paraoxonase (PON1) associated with high density lipoprotein (HDL) has been postulated to have a role in protecting low density lipoprotein (LDL) against oxidative modification, which has led to the proposal that PON1 is an anti-atherogenic, anti-inflammatory enzyme. PON1 has two genetically determined polymorphic sites giving rise to amino-acid substitutions at positions 55 (L→M) and 192...
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