Apolipoprotein C-II (ApoC-II) is the major activator of lipoprotein lipase, a key enzyme in the regulation of triglyceride levels in human serum [1].

1: Structure of a biologically active fragment of human serum apolipoprotein C-II in the presence of sodium dodecyl sulfate and dodecylphosphocholine. Storjohann R, Rozek A, Sparrow JT, Cushley RJ; Biochim Biophys Acta 2000;1486:253-264. PMID:10903476